Thread: Need advise on 454 build

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the block was freshly bored .060 over to a 468. hasnt been ran since the bore. So it's in good shape. The main thing that is beating my brain is i dont know, or have a way to find out exactly, what pistons are in the motor. All i know is they are .060 over KB's. So that makes deciding on a rod hard...Can i get away with a rebuild kit with stock rods and pistons? or will that be a waste if im looking for 450hp?

Originally Posted by ShortBedChevy

the block was freshly bored .060 over to a 468. hasnt been ran since the bore. So it's in good shape. The main thing that is beating my brain is i dont know, or have a way to find out exactly, what pistons are in the motor. All i know is they are .060 over KB's. So that makes deciding on a rod hard...Can i get away with a rebuild kit with stock rods and pistons? or will that be a waste if im looking for 450hp?

there will be parts numbers on the pistons if still on rods would not be hard to find out what you have i can just look at the stuff and i know what you have But i been building BBC for over 25 years .do you have a crank ? its not so cut and dry as just saying its .060 over you sound like you never built any BBC ? thats fine but you do need to fine out what you have or pay a guy that knows what you have a can long block it for you or at lest look over evey thing and get the parts you will need so you can put it together getting 450 hp out of a very mild bbc is not hard at all

I guess I should ask what piston material would be best. Forged piston? hypereutectic? Cast?

any thing you want in a rebuild kit i do not buy a kits i use what i want get it from one of the warehouses i deal with .have you put a mic on the crank is it in spec ? Pistons that a open question not so cut and dry but with bores are they fitted for cast or forged race pistons do not allways come the same size for any over bore . so that will say what you could use cast will take 350hp many GM 454 came with cast pistons and making that much power . hyper can take abit more . forged pistons past this and power adders theres alot more to it if you do not know much on BBCs and your not goinng to get anyone to help you then buy the.. How to build a big block chevy . book i may answer small questions on a bbc s or Jerry may help i not posting much on here any more pay is not that good