Thread: 427-454 build

Tweet

So you use stock length rods? 454 or 427 pistons? When the piston is at TDC will it be at the deck's surface or a .250 below? I've always wondered how that works. I know that both blocks are 9.80 deck height. I'd actually like to know too what other combinations I could use, i.e. 4.5" bored block. I understand it would have to have the 2 piece seal. I have a nice 427 crank and other big block parts to do another build.

Originally Posted by MyChev

So you use stock length rods? 454 or 427 pistons? When the piston is at TDC will it be at the deck's surface or a .250 below? I've always wondered how that works. I know that both blocks are 9.80 deck height. I'd actually like to know too what other combinations I could use, i.e. 4.5" bored block. I understand it would have to have the 2 piece seal. I have a nice 427 crank and other big block parts to do another build.

the only block that gm made that can go 4.500 is a bowtie or 502 block a stock block could go 100 over or 125 but then they are all used up and not all stock blocks should be cut out this far