fluid type for A-518

i have used type-f fluid in all my torgueflites since 1967 as long as it doesnt have a lock converter with absolutely no problems. type-f seems to cause more clutch chatter in the lock-ups. i even used it for years in gms slip-o-matics with no problems. my 90 diesel with 518 in it has about 80k on my rebuild and still works good with no clutch or metal in the pan. 40 years of rebuilding autos and had NO failures that this old man could blame on fluid. had some that i wish i could have though