Curtis, the Chevy 350 is the most aftermarket supported engine ever made. It's also about the simplest to get working correctly.
Get rid of all the computerized crap that's 40 years obsolete and unsupported and buy a 4 bbl Edelbrock carburetor and stock intake manifold. Install an HEI dizzy and be done with it. No muss, no fuss.
Verify that the engine isn't shot first. Compression tests, etc.
