6-71 Blown 408/416

Good to see you on here again Ben. With a 408 or 416 I think I would be looking at an 8-71 as well. A 6-71 was designed for no more than 426 cubic inches so you are getting near it's top limit so heat would become an issue once you start pushing the drive ratio up. As far as a stroker kit, I have not seen one, but you may be able to use a chevy piston to get what you need.

Jack