I am getting the message that with some fine tuning and driver education performance could improve. I am a little hesitant about the takeoff. I doubt the rpms are ever at 5,000 when I pop the clutch. I am too busy staring at the 3rd yellow light to know rpms exactly at launch. But, the T5 trans, 11 inch clutch and 9 inch rear are built to take a lot more power than my old six puts out. I'll try higher rpms next time.
What is the Gonculator? I read in the 12 Port News that the GMC rockers have a 1.47 ratio, not the 1.5 that Isky assumes. Mine are fabricated steel rockers, not the cast iron type, but the the 1.47 applies to both. I measured a spare set and 1.47 looks correct. People have recommended a Clifford 4 barrel manifold and a 600 cfm Holley with vacuum advance. I might do that first.
Thanks again for your help.
