A "383" is a Chevy 350 bored 30 over and stroked to 3 3/4" with a small block 400 crankshaft. For some unknown reason the hotrodders think that engine walks on water. It's really a difficult buildup that requires a lot of expensive machining, with a whole bunch of drawbacks. A well-built 350 will eat its lunch every day. If it's already in your truck, maybe you should consider swapping the cam and lifters for something like a Comp Cams 268H hydraulic and drive on. Solid lifter cams have a very limited use, mostly in extreme RPM racing applications. I can't think of a good reason to run a solid lifter cam in a street machine.
Jerry
