What kind of horsepower to expect 383 build

I used to run that exact combination in a 68 Dart GTS back in the eighties. The car was about 3000 lbs with me in it, and ran 11.80's @ 108 with a 4.56:1 gear and 28" slicks. There was a lot wrong with that car, and it probably had a bit more in it, but I pretty dumb at 19.

I have a fresh version of that motor, with a modern cam and some other parts, and with the TRWs at zero deck, 906s with a .030" cut (don't remember the ccs), and 1009 gaskets, it measures exactly 11.8:1 CR.