F**K YOU TAIWANESE/CHINESE MADE JUNK

This thermostat is not that type, taking a smidge off the edge will be fine. Also I may cut the recess a little bit bigger which is not a hard job to do, but it so sure does suck when I have to fix new parts.

Maybe with lots of RTV lol. It's really bad, that why I'm replacing it.

Edelbrock 2176 Performer, there is no recess.

It's just about too small.

Summit and whoever is the lowest bidder for Summit.
By the look of it, the t-stat fits down into the recess in the housing. That is not an issue, just stick the gasket to the t-stat housing. I put just a very thin smear of silicone on the manifold side of the gasket. In my experience it is easier to scrape off next time while aiding sealing any irregularities now.