The link I posted quotes a '78 catalog listing for an L2308AF, described as a 427 Chevy 12.2:1 slug for a 427 Chevy open-chamber 2nd design. Meaning the 1st design would have to be in an older-than '78 catalog...
This pissing match, however Ford-informative it may be, isn't helping the OP....at all.
The OP isn't helping his own cause, by not giving us dimensions. We know it is a big compression bbc open chamber piston, but for what engine? 396, 427, or 454. Diameter and compression height would tell us.
