512 stroker questions

Hello everyone, I am starting my 73 Duster 4 speed, six pack big block build using a 400 block. I have been looking at buying a .040 over dished piston 512 stroker kit from 440 Source. I have seen a few mixed reviews. Are their kits good, or should I look elsewhere? With a 512 kit is there much block modification required so rods don't hit, etc? Their website says little to no modification. I plan on using Edelbrock Performer RPM heads with the 84cc chambers along with a Mopar Performance dual plane six pack intake. I know I can get better performance out of a 4 barrel but I have a set of 440 six pack carbs already and want to use them. I also have a set of Schumacher headers. What cam would be good with this set up, and any other suggestions?