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Old 02-18-2000, 09:44 PM
JoeD JoeD is offline
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Join Date: Feb 2000
Location: Royal Oak, MI
Posts: 59

Im interested in building a 451 using a 400 block. I've seen various kits advertised, but i dont think ive seen a cam or head recommendations for these kits. I want to build a reliable street engine thats capable of mid 11s in a fairly stock 70 e-body.

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Old 02-19-2000, 02:45 AM
richardd richardd is offline
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Join Date: Feb 2000
Location: Concord, CA
Posts: 17

Hi JoeD. I am researching a similar project, (see thread on Street Sleeper). Feel free to email me at if you want to compare notes.

Any good head for a 383/400/440 will work great here. 906s seem to be the standard ut sometimes hard to find. 452s are also good and include the hardned seats for unleaded fuel.

Get a good 3 angle valve job go with the high performance valve springs for extra insurance especially if you go with a hot cam.

For the street you will want your compression ratio around 9.5:1 in order to use pump gas. You can get close to this through a combination of piston selection and milling the heads.
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Old 02-20-2000, 03:55 AM
ChristianCuda ChristianCuda is offline
Moparchat Barracuda Owner
Join Date: Mar 1999
Location: Edinburg, TX 78539
Age: 45
Posts: 784

I would use the heads that came off your four hundred but to get any kind of decent power you will need to port them using Mopar Perfomance porting templates. This and the new springs already mention will go along way to producing a good engine you will enjoy.


68 'Cuda 383 Working on adding EFI
69 'Cuda Race Parts Car
76 Duster 273 recent transplant
95 Neon 2.0 SOHC best of 16.96
84 Dodge Ram D50 transplanting 360
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Old 02-21-2000, 01:59 AM
451boy 451boy is offline
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Join Date: Dec 1999
Posts: 286

Cam and carb it just like a 440. The motor thinks it is a 440 since it has the 440 rod to stroke ratio (as long as you use 440 rods that is). It is just a lightweight 440 so you don't have to get tricky with any "stroker magic" cams or anything.
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