Is this a track only car? If not, get your 383 to 550-600HP and add a 150 shot of N2O on track days. 750HP on the street will not be fun.
I have 596HP. With 335 tires I can't hold the first 3 gears if I romp on it. I run a 200HP shot on track days with slics. My car is about 150 pounds heavier than yours.
Putting nice heads (AFR210, Airwolf 220e etc..) on your block with a forged rotating assembly along with a solid roller cam running .600" lift and about 250* @ 0.050 will get you there. Then add the giggle gas.
You'll have over half your money left over for suspension mods, tires, brakes or to save for use with your GI bill.