I was led to believe that if I exceeded the low 9:1 compression ratio range with my TBI 350; I'd be in for detonation problems. The machine shop I visited the other day to inquire about a rebuild said that he's done a TBI 350 in a full-size 4x4 chev that is running 10:1 with no detonation problems with the stock computer. Does this sound right to anyone? I'd love to be able to bump it up to 10:1 for better torque & HP but I'm curious about the detonation issue. Can anyone help? Thanks Brian 89KBlazer Build it Right or Don't build it at all!!