
I’ve got 2 engines to work with here...a .030” over 4 bolt 350, and a complete worn out L31 out of my 1999 C2500 suburban. Both need completely gone through, the Vortec motor more so. I’ve got several sets of Vortec heads, a performer Vortec intake (2116 iirc), a 9895 Holley 650 spread bore carb plus multiple other square bore carbs, a couple of hft cams that would work well (comp 260ah-8 and a crane 272 energizer, but I’m not opposed to buying something else if needed), plus most everything else I would need. All I really need at this point is a crank and pistons to build a 383.
The truck comes with a supposedly 25k mile rebuilt TH400, but I also have an excellent 4l80e out of my ‘99. It has 3.73’s and weighs probably 5500-ish pounds. It will be towing up to 6000 pounds on occasion.
My ‘99 suburban was a dog even when running great...I want something better. How would you build it?