Project Nighthawk

That thing is looking killer!
I could not tell in the pics but make sure that anywhere you have wires or hoses going through a hole in the metal body that you have a grommet in them. Also, the steel braided hose will eat anything they ride against from the vibrations going down the road so you have to make sure that you clamp them away from everything. They should be touching nothing but clamps.

You should video the first start up so we can hear it too!
I am wanting to do the same type truck with the 383/TF727 I have in the garage. It's a factory 4-barrel engine out of a 65 Monaco. After the 318 twin turbo build for my 69 340 4speed dart swinger, that's the next project. 383, .030" over, 440 crank=431", also with twin turbos.

Your valve cover clearance is real tight. You should probably use solid mounts.

P.S. I have plenty of differnt size adel clamps available for wires and hoses (or anything else you want to clamp in place). They are aircraft clamps, aluminum strap with high temp rubber insert...top quality as used on all commercial and military aircraft.