Well a buddy of mine just got a 1982 full size blazer 2 door with the removable top, but now the novelty has kind of worn off and he is looking for some more performance out of it. its got a 350 with a th400, what is the most cost effective way to get at least another 50 h.p.? I told him to "just spray it" but he is hell bent against it for some reason. any suggestions?