Thanks for the info. I would love to find that dead nuts match, but they don't seem to be available. I'll just chill till I actually need them and see if I can get lucky. My engine isn't even out of the car yet. Just parts shopping.
summit is really good about listing the port measurements of the gaskets in the specs, so give it a whirl.
i can tell you that you'll need *early* 318 exhaust gaskets, the later stuff is way big and just close enough to let you think that they might just work. they're readily available and inexpensive though (felpro) and mr gasket has some trick copper ones that are a little bit of money.