Stroke old 340 or new crate engine

WCMachine said

trying to decide what to do with my 1970 340. I'm getting ready to pull the engine and trans from my prostreet duster. I can't seem to decide wether to rebuild it into a 416-420 or just buy a crate engine. I'd like it to make 500hp normally aspirated and possibly install a troque storm supercharger. If I rebuild the 340 I can get a compression ratio thats more suited to the supercharger. Crate engines seem to be around 10:1. Also seems like most crate engines I've looked at use cast cranks. Seems like forged would be better but maybe its just over kill. Opinions?

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Since it is not a matching number car. I have to ask what your budget is. A good running 1970 340 is worth a good chunk of change. You could sell your 340 for enough to pay for a significant part of a 360 based stroker motor. Your choice as to whether it is a crate or you source the 360 donor. Let's say a good 360 based stroker costs $8,000 (+/-), and you can sell your 340 for $2,000. now your stroker is only $6,000. That's what I'd do. If budget is not an issue, stroke the 340. I'd go with a forged crank. Ma Mopar spent the extra money to put them in 340s for reason. They are stronger.