2.76 open to 3.55 Sure Grip...expectations too high?

Righty Tighty said
I just swapped rear ends. I went from a 7-1/4 2.76 open to an 8-3/4 3.55 Sure Grip. Now, I understand that I’m not driving a race car, but I was certainly expecting a more drastic change upon acceleration. Am I mistaken?

Looking at your sig. and not being familiar with your exact build;

71 Scamp, 318LA with 302 heads, .454/.468, 256/262 @ .050, 112* LSA, Performer intake, Eddy 1406, TTi long tube step headers, A904 to 8.75 3.55 Sure Grip

I’m not sure what you were expecting. Your cam is very mild with very small restrictive (as cast) ports of the 302 head. The cams 112 LSA should have had added compression from the pistons in order to negate the lower torque output from the wider LSA. If there was a tire diameter increase, this would slow down the car as well. Added stall to the converter would help the launch. But it should not be needed for a cam that size.