"Low buck" 440 drag build

Well the whole plan of the car was just to get it runnin as quick as possible and cheaply that's why no machining. Dusterdoug my dads duster has an untouched 440 bottom end with dual 750 double pumpers on top a tr and just a step down in cam and runs 7.20 1/8 miles so tell me how much power I won't be making again