88 3500 dually 4x4

[SCOTI]

Originally Posted by wyattglock

BTW, I also had a local shop remachine the heads. They installed bronze guides, hot tanked both heads, magnafluxed for cracks, milled off .005", and did a three angle valve grind. Cost me $319 out the door. Probably the best money spent on the heads IMHO.

Yep. 3 bills isn't bad.

Reducing the chamber volume to help bump compression & better cam timing numbers will definitely help. The exhaust flow benefits from headers helps too (air-in; air out). I did the above & switched to flat top pistons @ the same time.