5.3/T56 Swap Thirdgen Dyno

Dyno my my 1986 Trans Am with a 5.3/t56 swap. The engine is a 2001 lm7 5.3 with a gmpp hot cam and ls6 springs 219/228 .525/.525 112lsa ls1 intake manifold stock 706 heads racing innovation 1 3/4” long tube headers into a 3” y pipe that dumps into a single 4” catback that runs out the back like factory. The dyno guy started the pull around 2000rpm and ran it to the 7200rpm limiter. It made 333whp and 340wtq. The graph showed it was very rich during most of the pull. The car has only been street tuned by me. Still managed 21mpg that day with the dyno runs and the 3 hr round trip to the event any back.