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  #1  
Old 08-03-1999, 06:35 PM
Richard Reardon Richard Reardon is offline
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As I mentioned a few months ago, I haven't been "up on" MOPARs since the very early '70s, hence my questions @ times. This gives you guys a chance to exercise your gray matter and they say exercise is good! Anyway, to the question (s). Christopher confirmed that the 383RB and the 426W share the same bore size @ 4.250". ( I thought it was 4.325, but that's why I communicate w/ you guys.) I wonder what the bore is for the 413? I'll have to dig out my references on this too. With all these numbers in mind, is it possible to put a 426W crank, rod/piston assembly into a 383RB, 413? ( bore? ) or 440 to get 426 cu. in.? I guess it would all be determined by the crank journal sizes. I'm settled on the 426W as being the ultimate in the BB MOPAR wedge motors. It's in the combination. The 440s I've seen just don't wind-up like the 426. Same with a "OOPS" chevy 427 vs a 454 or a 327 vs a 350. I'll take the 427 or 327 any day. As for Fords, the only thing that'll touch a 427 hi-riser is a SOHC 427. Even the BOSS 429 or a 428 SCJ engine won't equal the 427. So if/when, my combo will be a 426W. I think my next choice is a 413. I want something different. 440s are all over the place. I think a 413 can run with the 440 with a little help, not much though!
Well, what have I started here!? I'll be looking forward to all your thoughts.

Richard
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  #2  
Old 08-04-1999, 12:18 AM
cudadude cudadude is offline
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Richard,
The 361,383,400 are grouped into one class called the "B" engine. They all share the same 3.38 stroke. They are a low block. The stats for B engines are as follows- 361 ci. 4.120 bore/3.380 stroke. 383 ci.=4.250bore/3.380 stroke. 400 ci.=4.340 bore/3.380 stroke. The 413,426,440 are grouped into another series called the "RB". They share the same stroke of 3.75. The stats for them are-413 ci.=4.180 bore/3.750 stroke. 426 ci.=4.250 bore/3.750 stroke. 440 ci.=4.320 bore/3.750 stroke. There are 2 different block heights. The bore's for the 383 ci. and 426 ci. are the same. Who knows with all the stroker kits on the market today anything is just about possible. I have even seen stroker Ford motors using offset ground Chrysler rods.Now days if you can think it up and have the money a machine shop can do it,or somebody like aftermarket speed suppliers will do do it also.One thing i forgot to mention was that the earlier [1958-1962] the 383 ci. was a "RB". It had a bore of 4.030 and 3.750 stroke. I hope this bit of info helps.

cudadude!
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  #3  
Old 08-04-1999, 01:28 AM
moparsofcamelot moparsofcamelot is offline
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Richard, the new posting for wedge info was for you, but I accidently posted it as new. moparsofcamelot.
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  #4  
Old 08-18-1999, 01:21 AM
SUBLIME 73 CHARGER SUBLIME 73 CHARGER is offline
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I AM ALSO THINKING THE SAME AS RICHARD. IF YOU SWAPPED A 440 CRANK INTO A 383B BLOCK WOULD YOU HAVE A 426 LOW BLOCK. I KNOW IT WOULD BE BEST TO BUY A CRANK FOR THIS APPLICATION, BUT HOW WELL WOULD A CUT DOWN 440 CRANK WORK? I KNOW IT HAS TO BE CUT .125 ON THE MAINS AND REHARDENED. HOW DEPENDABLE IS THIS? EVEN IF I HAVE TO SPEND $1000 ON A NEW CRANK I'M GOING TO BUILD IT. IT MAY TAKE A LITTLE LONGER THOUGH.
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  #5  
Old 08-18-1999, 02:17 AM
ncarnes ncarnes is offline
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I spoke to Muscle Motors at the Mopar Nats about this combo. They sell a kit that makes a 383 a 431 and a 400 a 451. It comes with the crank and pistons and rods and everything needed to do it. Thats the kit I am putting in my Duster when I am ready for it. There kit is around $1700 but the pistons must be special made(not stock Mopar parts) so for special pistons and 440 rods and crank with all the bolts and bearings and rings thats a good price.
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  #6  
Old 12-12-1999, 06:17 AM
451boy 451boy is offline
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Richard, I don't think the 426W was actually a better engine than the 440 even though it might have seemed like it. The 426W heads weren't as good, and the rotating weight was the same. So you have fewer cubes, same weight and worse heads. My guess is the 426W gave up a bunch of hp to the 440.

The 426W is kind of cool though since most people don't know what it is. I had a 426W in my '65 Coronet 500 for years until I blew it up street racing my buddy's 440+6 car. I used to whip that 440+6 car but that was because he couldn't keep those carbs in tune!

You can build a low deck 426 by using a 440 crank in a 383 block. That motor would cook! It would be a lot lighter than a RB 426W due to the shorter pistons and deck height. That would be the way to build a 426W these days.

Ross makes a forged piston for this swap but you can use the KB Ford 427+0.040 piston with a few mods. Use some modern heads and manifolds and you should have a 426W that shreds pavement.
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  #7  
Old 12-13-1999, 08:45 PM
azazello azazello is offline
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Wink

In response to cudadude's post, the 383 RB was not the only early 383. I've got a '60 383 in my DeSoto and it is not a raised block version. The 383 RB was produced for only a short time (1959-1960) while the B version was produced from 1959-1971.
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  #8  
Old 12-20-1999, 07:08 PM
Richard Reardon Richard Reardon is offline
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451boy, Thanks for the tip on the LB 426W using a 440 crank in a LB383. This is very interesting. I will do some follow-up investigating on this matter, typically with Christopher and the 'Ole Hippie hisself.
If you have more in depth info yourself I'd surely appreciate additional communication with you also. Has anyone done this that you know of?
If you care to e-mail me direct my e-mail address is as follows; <rich.reardon@tellabs.com>

Also, azazello had some interesting notes on the RB383. For some reason I thought those 383s used in the Road Runners were of the RB version, but I believe they were just LB383s w/ the 440 heads on 'em. I do remember the rare 383RBs, but forgot when they were actually in service. I guess finding a RB383 would be a real find! Thanks for the info.
Regards, Richard
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  #9  
Old 12-20-1999, 09:54 PM
451boy 451boy is offline
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I haven't built an actual running low deck 426 although I did buy two of the KB 427 pistons in order to assemble a mock up. It will work but the pins need to be bushed and the valve reliefs have to be modified. It might be cheaper to just buy custom pistons unless you have access to a good machine shop.

I have two 426W motors, one is a 1966 motor and the other is an Industrial 426. So if you really have your heart set on a true, blue 426W they are out there.

The RB383 wouldn't be a good motor to play with since they have such a small bore size. There is a wrecking yard near where I live that has a car with a RB383 motor in it. They also have a car there with a Mopar big block 350 motor in it. The 350 is in a '58 Plymouth two door hardtop. The RB 383 is in a Chysler, I think it is a '59 or '60.
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  #10  
Old 12-21-1999, 06:24 PM
Richard Reardon Richard Reardon is offline
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451boy, 426S hah!

WHERE DO YOU LIVE!!! ~.\|/.~
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  #11  
Old 12-21-1999, 07:22 PM
451boy 451boy is offline
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Portland, Oregon.

The boneyard is up in Boring, Oregon. It is called U pull it U save. Lots of old Mopar stuff in there. I've been mining it for years!
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  #12  
Old 12-21-1999, 11:27 PM
Elwenil Elwenil is offline
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Hey! What's up with copying my trademark!?!?
~Elwenil~ ~.\|/.~
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  #13  
Old 12-27-1999, 04:05 AM
1st weg 1st weg is offline
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Try this on for size. A 1958 350 wedge bored.190 over,with a 413 crank,turned down mains = lo-block 426.The hard way!! It was the block I had back in high school,GO-figure. Ross 10.5:1 w/.990 pins ,1/16 C&A dura moly rings.Rods are 383 bushed,beems are polished,ARP bolts and clevite77 bearings. Cam-Ultradyne solid 238/248 @.050 - .507/.526 lift w/lash . K-motion 850 springs. Milodon mega flow 2.14/1.81 valves. Harland Sharp 1.65:1 roller rockers (REAL nice pieces) Muscle Motors bracket killer 452 heads.Flow data @ 28"

lift int exh
.200 150.2 109.5
.300 202.5 151.7
.400 226.4 162.4
.450 243.9 172.6
.500 261.5 182.8
.550 270.9 189.3
.600 280.3 195.7
M-1 single plain /carter 750. coments, or suggestions appreciated. Thanks; 1st weg

[This message has been edited by 1st weg (edited May 14, 2000).]

[This message has been edited by 1st weg (edited May 14, 2000).]
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  #14  
Old 12-27-1999, 02:04 PM
DartGT66 DartGT66 is offline
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You might as well bore it bigger than that, because I doubpt you will not have any cylinder wall left after .190" overbore. Or at least the cylinder walls will be very thin. I have once bored a 318 for 340 pistons, 0.130" overbore, and the cylinderwalls were very thin after the bore. You could punch a hole to them with a screwdriver. Anyway, it worked, but I think it was an exceptionally heavywall block.
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  #15  
Old 12-27-1999, 07:12 PM
1st weg 1st weg is offline
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DartGT66 I have found out through the years that the 58 block did have thicker walls.I could go another .030 ,but why press my luck. The engine was togher as a 383 back in the 70`s, and ran good then,but I never had the money to do what I wanted to do. I guess it`s more a nostalgia thing!! 1st weg
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  #16  
Old 12-27-1999, 07:30 PM
451boy 451boy is offline
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That would be the hard way to do a low deck 426! Just finding a 350 block would be a tough chore. It shouldn't be much problem to find a 413 block that would go 0.062 over to be 4.250 std bore. That makes the RB 426 of course which is quite a bit heavier than the B426 based off of the 383 block.
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