What kind of horsepower to expect 383 build

I got it installed this week and started it up. The good news is it runs and sounds very good. The bad news is the radiator started to leak after running for 10 minutes or so. 2 cracks developed in the top tank. I have to pick up some acid core solder and repair the radiator. I have a few bugs in the tune up to work out and some more things to fix before she is ready for a test drive. I need to drain and clean the fuel tank. I thought I drained it a long time ago but I shined a flashlight in the filler and saw some fuel still in the tank. It is currently running off of a rubber hose into a gas can full of 100ll av gas.