Old school???.Well in a week I am going to be 63 yrs old.I owned a B/MP 57 Chevy with a 327 at one time.I have over the yrs watched the SBC evolve.Much of what you see today is the end result of solving problems that went on for yrs.Point being not to take a advantage of that development just for the sake of fond memories is a total waste.
My advise to the O/P is to pull the 327 and store it for when you want to sell the car.Then build a play engine so you can go out and have some fun.Honestly it doesn't take much to get 400 hp out of a 383.