anybody know what thread the oil filter mount stud is? i need to chase it with a die.. filter is tight
AFAIK, the "stud" is just a replaceable threaded insert. Grab a deep socket, remove the old insert and put a new one in, problem solved.:stupid It is a 3/4-16 thread, assuming it's not a later-model with a metric thread (FL-820 filter iirc), but not really worth running a die over. They should have them at one of your local dealership parts counters.
It depends on a few things, but normally the answer is no. Almost all of them had English threads up through 1993. Unless you have a mutant like mine with a late-year build date (July 1993, F4TE block but English/FL1A oil filter w/ no cooler), a 1993 shouldn't be metric. I haven't personally seen a '93 with an oil cooler, but that sure doesn't mean they don't exist.