(1) drawfile (A)the stat housing & (B) the intake or pump housing flat with a wide fine file & use a rag to keep filings out of (B). (2) gasket sprayed with Permatex 99MA "high tack" the red stuff in the spray can. Goes on light/even & is extremely tacky & seals very well. (3) see #1 & if it's a chrome housing get the chrome off of there & people have good luck with the NAPA iron stat housings