Got a differential to repalce the busted one, but it looks like the replacements cooler was on the rear of the trans, and mine is on the side. I see one (the aft one) plug for the cooler, and ...that's all. The forward hole seems like a blind, untapped hole. Is it possible to convert a rear cooler diff to a side cooler diff? Drill and tap? HALP! Steve Bigelow 84 5000S