give a man a fish and feed him for a day, teach him to fish and....
anyway, why not do it yourself? What;s the 383 build? if it's mild I'd take it apart start w/ a 6.5PV, 72-76 jets, 28 squirters, and plain springs. Then I'd turn the mixture screws in all the way and back out 1.25 turns. Prime it and trun the idle screw up so you'll have about 2500 rpm at start up. Let it warm up back the idle down to about 22-2400 and set your timing in full at about 36*, back the rpm's down to 800 and set the misture screws for best idle/vaccuum. Reset idle if needed. Go for a romp and see what needs tweaking. Nothing anybody does is going to be 100% on.