Help on 408 build

Somewhere around there.... Icon lists an IC745 which is -20.5 dish+valve reliefs. Same compression height, same ring pack, 10 grams more weight. That gets the OP down to 9.75 SCR and just under 8:1 DCR with his cam. With the small extra weight, you either live with it being a bit out of balance, or balance this by adding a bit more weight to the crank, or taking weight off. The rods are probably the standard SCAT I beams so that is another area to work for balance.

They also list some with more dish volume but a lower CH so the numbers need to get re-worked for those. But 7.95 DCR is runnable with fair to decent tuning and the cam can be retarded a few degrees to help too.

I have not looked at other piston vendors.