Camshaft choice for 408 Magnum w/ boost plans

MiradaMegaCab said

Hmm, those KB 356 pistons are Hypereutectic, milling the domes, coupled with boost is a gamble.

Try these out, forged 2618, designed for boost with a 34cc dish. You’ll still be around your 9:1cr.
Icon Pistons IC982-030 Fits SB Chrysler Dish 34cc Bore 4.030

Click to expand...

No.
I've lrun them more than any other type of piston and i will tell you..they are made to be milled to your desired quench distance.

My 410 with a 60cc chamber and a .046 gasket i had 9.8 compression. I squared the block, all pistons were zero at the quench ledge with the actual pads above the deck .046 or zero with the gasket. I had to grind about .020 worth put of the shallow side of a set of J heads to end up with the target .030 quench distance.
The piston just need plenty of top ring gap and not too much total timing. When all is 'right' ...30 degrees or less is where they live long.