what kind of high compression pistons can i run. i got eagle rods and was womdering kind i run NIPPON RACING PERFORMANCE ITR PISTON KIT. they say with my itr it will make 12.1 compression. i got a built head its ported skunk2 vavle train and skunk2 pro 1 cams. are these pistons ok to run like this with a all motor setup. are should i go with forged pistons? help me with the problem i have.