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Old 07-21-2006, 08:14 PM
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converting a chevy 454 into a 427

Hello,I have the insides for a 427 engine.some 68 L-34 heads and I was wondering,can I take the externally balanced guts out of the 454 and put in my 427 internally balanced crank.And what pistons would I have to use to run on regular pump gas?Carbs,I have a Holley 800 cfm manual choke,and an Edelbrock 750 cfm electric choke which one?The 454 is out of a dumptruck any cam suggestions?Could someone make some sense out of my KAOS?

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Old 07-23-2006, 08:08 AM
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puting closed chamber heads on a 454

If I put some L-34 heads on a standard 454 with flat top pistons,would it increase compression? A piston manufacterer claims that their pistons can be used with either,is this true with all flat tops? Thanx
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Old 07-23-2006, 08:35 AM
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On a BBC with flat top pistons the closed chamber heads you get around 8.5-9.0 to 1 compression which is good for street use...

You can use the 427 crank in the 454 block as they are basicly the same block, also the rods will work but if you use the flat top pistons for the 427 stroke you will lose some compression (not much but a little)... Also you say the 454 is out of a dump truck...? I would be sure to check the casting number to make sure of what you have because it may be a tall deck 427 or even a 366...? ID the block and go from there...
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