Offenhauser 5489 Intake Install

Keith Mopar said

I love that JB weld high heat. Also JB weld original is an awesome product.

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Yes, I googled for info on best epoxy and watched youtube tests. The original JB Weld tied for best in strength and adhesion. The "fast cure" epoxies were horrid, not even bonding tight to metal surfaces. I was going to go to Ace to buy original JB Weld, then saw I had the unopened "High Heat" one on the shelf and it seemed the best choice for filling surfaces in cast aluminum as it bonds well and becomes very hard. It starts hardening quick so had to screw the fitting all the way in within 2 minutes after mixing.

I forgot to mention that I used a stainless steel T-stat housing (ebay), with a silicone rubber gasket from Real Gaskets of TN. They make similar silicone gaskets for the oil pans and valve covers of all my Mopar engines which I used (slant, SB, BB). A bit pricey (~$30 oil pan), but worth it if they last forever as claimed. They began by making gaskets for airplane engines (more critical). I also have a head-gasket kit for a 5.2L Magnum engine which appears to have silicone valve cover gaskets, so perhaps that was standard for those. Looks like they'll fit, but the cork gaskets I have on there still look OK.