Now I have a new idea, sell off all the GMC stuff and get one of the 4200 Trailblazer 6 bangers and use my MS and turbo. This will give me a good project for this winter.
Sounds like a great idea.
You can only force so much fuel & air into that old cyl head. Limiting factor, plus can't rev too high.
The 4200 cyl head can flow 310 cfm @ .500" lift w/minimal work & can turn some high RPM, with supporting mods.
Nice sleeper BTW.
MBHD
