Thermostat housing- small block

tomt966 said
Warped intake manifold??

Where were you 5 R & R's ago?! LOL

I put a straight edge on the manifold mating surface, and it's not flat. It dips down at the bolt hole locations causing the cup. The housing is now flat since I took 80 grit to it. Will do the same with manifold...should be OK.

Thanks