As far as Im aware of there are 3 BB aluminum casting numbers but I still am searching to see if there are any "0" code prototypes ever made. Im in conversations with my NCRS judge friend trying to eventually document these. RoadCourse and 1/4 mile guys to me are where I find these and occasional Marine shops Ive seen these at. Ill keep digging until Im exhausted on my searching...
Also, as there were a few Small Block GM aluminum castings; Is there any Board knowledge of those #'s?
