Thanks Dan, Randy, and Earl for the help!
Earl, sorry for the confusion with the port sizes. The 2.20” x 1.24” measurement is the intake port size for the heads, 1.97” x 1.12” is the port size in the Cobra intake manifold , slightly larger than stock. Thanks also for the photos. Do you cut the FelPro 1250 water jacket opening square to match the port on the heads or just leave it as is?
Unless I find something indicating I need a thicker gasket, the FelPro 1250's look like a good choice, port sizes are 2.00" x 1.20", in between my head port and manifold port sizes. These are also ported HiPo heads, so there is not a lot of surface area on the head port bottom for a gasket to seal, I assume having as much gasket material as possible is a good idea. The FelPro 1262 is a little wider than the 1250. I'll likely go with the 1250-S3 version, I like the idea of the inner steel layer.
Thanks again!