Edelbrck vs Trick Flow

I got 1.8 10ths gain going from a 750DP on a stock all iron 2.02 headed '71 340 but with a .590" sft cam, 1.3/4" race hdrs, 4.30 gears/4200 converter back in 1985, to a modded 850DP, no wonder you didn't pick up much, you strangled the motor.