429 rebuild or swap for another big block

Hecuba

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What vehicle(s) do you drive?
66 cadillac commercial chassis hearse
I am actually in the process Help putting in a Gen. 5 4 54 in 66 Cadillac Fleetwood Fleetwood hearse. The 454 is about 60 pounds heavier than the 429 The steering length is an issue you have to have front sump and it's just a hair whiter than the 429 I'm gonna have to make headers or get centre dumps. The 454 Is out of an 89 Chevy Silverado 3500 Using the TH 400 from the truck changing out the tail shaft from the Cadillac definitely have to change out all motor mounts.
 

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Caddylackn

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Sounds like a nice project. Are you going to retain the TBI or go carb?
I'd get rid of the factory cam and use a more modern "RV" type cam to help get that weight moving. Is gen V a roller cam year?

It looks like late 60 to 70s pickup headers would work on the passenger side. I can't see the drivers side.
 
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