Hey Pete.
Overall driveability should actually be better with the changes mentioned. Do you have any idea what your air to fuel ratio is by chance ?
One of the earlier combos in the Firebird was built very similar to your car and ran very strong. 400 +.030, 11:1 CR, #16 heads slightly milled/mild port job, Isky hydraulic cam (later Crane), Torker intake, 800 Holley DP, Hooker Super comp headers, M-21, 4.10 gears. Ran consistent mid 12's on motor.
|