Probably prefer the 360 option as i already have one in the car. So the convertor will be ready to go and if i went 340 i would be looking at more stall. Please note i am looking for a reliable street/strip motor,Eg no eagle parts. What sort of money are we talking? I have ported eddys comp roller rockers and would prefer to stay with a hydraulic cam. Looking foreward to your reply. Regards Damian.