eddy RPM heads--84cc chambers, OOTB zero deck flat top pistons with valve reliefs 10.5:1 compression comp XE275HL cam RPM intake 1 7/8 headers holley 750HP
made 505 hp on the dyno, tons of bottom end. over 500 ft lbs torque from 3000 rpm through 5800 rpm
with stock 906 heads reconditioned to like new, all else being the same, it was about 9.5 compression, and maybe only about 450 hp, due to the lower compression AND lower airflow of the heads
