just bought an 89 gmc vandura sl series with a 350. van runs great, has very good power for 170k on her. she has no leaks what so ever from anywhere. except the black residue/oil spilling from the exhaust when given alot of pedal. also, goes through about 2-4 quarts of oil a week depending how hard it's been driven. again, no oil leaks from engine. thanks in advance.......tim