Have to admit, i jumped the fence to aluminum heads.
Current combo;
30 over 400 blk w/eagle crk(461 ci)
Untouched 87cc's
Crower RAIV cam w/1.65 rkrs.
10.2 cr "calculated"
Have to find notes on cranking comp, but think it was 165-170
Been using 87 on the street for 2 years, and 93 at the track without a any issues.
Got to love that!