i googled it up, and could find jack schit on what i was looking for
whats the compression ratio for an SO 5.0 with E6 heads, and the compression ratio for an HO with E7 heads?
The '86 HO was 9.2, don't see why it would be any different for a SO... '87-up HO is 9.0, the .2 drop is because of the valve relifs in the later pistons, as both HO and SO heads have a 64-65cc chamber.
Hot Rod magazine Feb'87 states 8.9:1 compression ratio for 87 Tbird Sport in a comparison article vs Turbo Coupe. I read too much!