according to my old chiltons from early seventies 218 i believe, cold is the minimum.

i tested a 220 once that had only 185. it would run but was tough to get started.

on the threads you should be able to get five or six turns in before it bottoms against the rubber gasket. you can feel the gasket which will feel much different than a stoppage from being cross threaded.

good luck

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.