i got the same quote from the supercharger store after chatting with the rep i decided its not for me, i would need to change my pistons and cam, think ill just juice what i got.
I run pro comp heads on my 440 30 over they have comp cams hardware and are mildly ported, i run a victor intake and a 600 lift solid comp cam, the engine runs good, had to use coustom push rods from manton and the push rod holes had to be reworked.