I flipped the rear on top the leaf springs on my truck and i have caltracs on it with rancho shocks. hooks very well and been well into the 10's on low boost. i run 30x9 hoosier radial slicks or 295/65 drag radials

i can tell you this you are shorting yourself on that s475 (75mm) turbo on a 440. mine is a .30 over 360 and could benefit from a 80-88mm turbo. That 75 mm is tiny on a 440

i have a AAR brand Fiberglass hood on my truck, and rear fenders on the bed are fiberglass. i have a mild steel 6 point bar in the truck with a small block turbo'd and the heat and a/c stuff removed. with me in it (200lbs) it weighs 3750. you should also look into 2.94-3.23 gears for it too. Turbos love the load.

please listen to people who have actual running and fast turbo stuff and not magazine mechanics

look up CW25 on here and turbomustangs.com. He had a 1980 big block turbo'd truck to help ya with turbo routing for a big block. his was a stroked 400 i think though