uh oh..... set back. water in oil

Felpro 1243 is for 318 small ports. Felpro 1213 is for 340-360 large ports. The Edelbrock intake is the large port, as it fits 318-240-360.
Should I use the 1243 gasket? or 1213? or it doesn't matter.

manifold was not re-torqued after run in.

Things seem to be making sense. Even though the engine was running well, I couldn't get any more than 15" of vacuum. cam isn't radical, just Sum-6901 cam kit. (vacuum leak as well.......)