Pivoting from 340 to 360

Wyrmrider said
If you mean domed pistons by the KB popups for the open chamber heads get the ones with the reverse deflector/ dish to keep the CR in the 9:1 range for a heavy car/ medium gears- your converter will be fine do not order the cam till you nail the compression and report
truck /motorhome even a bit less
design it for good quench .030-.040 piston to chamber-
you may need to do a trial assembly and measure
cc your heads- they vary widely and published data is bogus
your converter will be fine do not order the cam till you nail the compression and report
Hughes or Lunati Voodoo or there are a couple of Howards designed for Small block mopar lifter
get your springs for the cam lift- you may be too much for stock HP springs (the red ones with the dampner)
use viton stem seals- center two exhausts run hot
you do not need roller rockers - fixing the geometry is expensive

Thanks for the input. Cam and lifters are bought but not installed. The 340 had/has a mystery Mopar purple stripe cam. The 340 was a fresh build done years ago and put away, unfortunately not sealed up very well and rust has crept into the bores and the crank. The engine was just fired for the first time this Summer, so the wear on the timing chain is nil, but your points are taken. I'm not budgeting the small stuff. This is about the pistons. Good input on the springs.