Pivoting from 340 to 360

usually you can finagle the 373's with gaskets or
what you do is assemble all four corners for test and measurement of deck clerance before you deck the block and/or mill the heads
then cut to quench height
well worth it
also check out the KB 232 if you have smaller chambers
on the cam question
Best low compression cam is the Mike Jones Motorhome cam almost 20 degrees shorter than the DC 260 cam on the seat yet 50% bigger at .275
otherwise Lunati Voodoo line is first place to look
and once you understand what you are looking for Howard has a couple of Shelf 904 grinds and both Howard and Bullet have many many custom profiles
you can get 105 pound on the seat run forever profiles or heads up race profiles that eat springs
what you are looking for is matching the dynamic compression requirement with the intake close point and working from there
nm9 is correct a longer duration at 200 may or may not take more spring
I do guarantee that a .842 grind will take more spring than a .904 grind at the same durations - the .904 grind mechanical advantage allows it to loaf
one advantage is running a .904 lifter on a chevy profile is that in a chevy you have to hand select your .842 lifters to get ones with no chamfer - a real PITA
now you go max effort on .904 you have to do it too- but you are still way ahead of the bow tie The NASCAR .875 guys had fun with this too- pushing the limit
I'm thinking that Hughes has switched from ENGLE to Howard