I'm looking for some 4 barrel Olds cylinder heads. On D&Ds website they list -82 suffix as the 43cc chamber head, -534 as the 38cc chamber head and -746 as the 51cc head. Where are these numbers on the head? There are numbers stamped on the end of the head but it doesn't contain any of the above numbers and there is a number cast into the bottom of the center intake runner, 581829, could this possibly be a 43cc head?
On the underside under the intake runners... Yes that was cast as a 43 CC head.