Wow! Your car was working great!! My best 1/8 was 5.70 @ 123...my best 1/4 ET was 9.02, but the car did run 155 mph on one pass on a 9.08 run.I don't know what he ran on his 76, but I ran 5.30's in a 3200 pound car through mufflers with my PT7675CEA. It had a 3" downpipe.
The correct combo with a good 76 will make around 1000 and spool instantly.