OK. I've looked at the different sites for identifying Pontiac blocks and heads and have determined that my '67 Firebird had a '74 350 engine but the head markings are not shown at any of the sites. The have a 62 on the end port of the head not on the center two ports. The have the GM on the other end port of the head. They also do not have the machined land where the code number would be and there is no date code either. Some one has stamped the number 98800 and J&S on the front machined part of the head. Any ideas?
