also seen places of people putting forged 318 truck cranks in a 340, im assuming that means they share the same stroke and journal sizes? and just to keep this on topic with out the bickering, ive got J heads on my 360 that is just mild build with kb hyper pistons and around 9.75:1. no machine shop level porting or polishing, just a gasket match on the exhaust ports that i did my self, running hydraulic lifter set up, non roller, worth it to do some port and polish work with out going to a roller valve train or pointless to do one with out the other on iron heads?
