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  #1  
Old 04-29-2005, 11:56 PM
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Default 360 w/4-Speed?

I have a chance to buy a 360 motor from a friend. It had an automatic transmission bolted to it originally. I however would like to put the motor in a 4-speed car.

Can someone tell me if a 4-speed can generally be bolted to a 360 (considering the crank) or would I have to have the crank modified?
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Old 04-30-2005, 12:06 AM
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its a small block 4-spd right? i bolted a A833 to my 360 about 5 months ago, no problem. had a 904.
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Old 04-30-2005, 01:07 AM
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Biggrin

You need the correct flywheel since the 360 is externally balanced.
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Old 04-30-2005, 02:08 AM
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It is possible the crank must be drilled further to fit the tranny snout. Possible, not must.
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Old 04-30-2005, 04:26 PM
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Quote:
Originally Posted by rumblefish360
It is possible the crank must be drilled further to fit the tranny snout. Possible, not must.
I was worried about this...what would be a good way to determine whether or not it needs to be drilled out?
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Old 04-30-2005, 06:48 PM
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Theres a bushing that goes into the crank for 4spds. Purchase this small item and see if it fits in the back of the crank. Don't be alarmed if the bushing doesn't fit.
2 reasons here.
1.) The crank can be drilled to size.
2.) The hole only needs to be the size of the input shaft of the tranny. Some people have said that a bushing isn't a needed part. I don't know for sure. I have allways run one in the crank.
This is the only way I know of doing it cheaper than cheap.
The draw back is your taking it all apart.
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Old 04-30-2005, 11:24 PM
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If you don't run the bushing it lets the shaft flex. Wears on the clutch disc and input shaft bearings. And if it's not drill for the old brass bushing the newer magnum roller bushing will fit. It sits near the outer edge of the flange instead of deep inside the drilled hole for the old brass bushing. I've got one laying around here somewhere.
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Old 05-01-2005, 01:01 AM
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The pilot hole may be there, but if the engine was not mated to a manual, the hole may not be finish machined, just rough drilled. Napa sells a bushing for the rough drilled cranks to solve the problem.

torch
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Old 05-01-2005, 08:07 AM
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Torch, that very thought just crossed my mind this morning. Ya beat me to it. Good lookin out.

DW, ya got me on that one good.
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  #10  
Old 05-02-2005, 08:18 PM
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Oh cool, a bushing ready to go....I'll look into it thanks!
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  #11  
Old 05-02-2005, 11:23 PM
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Welcome,anytime.
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Old 05-02-2005, 11:51 PM
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You can also use the later pilot bearing that goes in the larger bore of crank tail. It comes in bushing and roller styles and I have found it be a much more accurate a way to go. No machining necessary, plus you don't have the inaccurate location of the rough hole to deal with.
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Old 05-02-2005, 11:59 PM
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Default Pilot Bearing

If you don't drill the crank deep enough, make sure the trans input shaft doesn't bottom in the crank when the trans is bolted to the bell housing. Dan
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  #14  
Old 05-03-2005, 12:23 AM
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Very important to be sure that even when using the upgrade type bushing, that you make sure the snout of the trans isn't putting thrust on the crank.

I have seen is destroy thrust bearings in minutes when not done properly.

A machine shop will charge you out the wazzoo to ballance one of those. There are templates out there to drill the wheel so it will be ballanced, at home.
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  #15  
Old 05-03-2005, 06:52 AM
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The template is in the Mopar chassis book.

torch
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