I have a Two Hole Thermostate housing with "NPT" Holes threaded in at the top on the ball surface on my GMZZ502. I can't remember where I got it or who makes it. I'm get-en old. My friend needs one for his GM Small Block Blower build up.
Any one remember who makes it and the part number..?? Been to Jegs and Summit. They only show a single hole Mr. Gasket 2557. The Holes have to be on the top "Ball" section of the housing. Billet Specialties makes an adapter that sits under the thermo housing but the holes face straight forward.
Any help appreciated ..