Hey guys I am to the point of the build where I am getting suggestions from Chevy guys on my block. It's a 340 block that I am trying to get good running street motor (375-425 hp) with good torque. I don't know any technical stuff like all the clearances. One guy tells me to zero deck the block and the other says leave the pistons 10-20 in the hole. Does anyone have Mopar suggestions? I have a set of J heads 2.02 1.60. Not sure of the chamber size or even how to find out.I want to run pump gas. Any info is appreciated, thanks.