PS forgot that these numbers were with the Dyno's 1-3/4" test headers, went to put our 2" headers on and ran into fitment problems with the dyno so that may account for choking the engine somewhat.
The 1-3/4” header did two things. It boosted the low end TQ substantially, and killed off a fair amount of top end power....... compared to something like a header with 2” primary tubes and 3.5” collectors. If you’re going to run 2” headers in the car........ you won’t have that 620tq@2800.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
