![]() ![]() ![]() Mokwa had heard about Jim Butler, of Leoma, Tennessee, a top Pontiac engine builder since the 1960s. They found and used a '68 Pontiac 400-cid block as the base. Mike Bray, a General Motors mechanic, helped Jim rebuild the engine and heat it up with hotter performance. In case you're wondering, it was pulled and put back in the painted GTO because a con rod was just hitting the windage tray. ![]() GM mechanic Mike Bray helped Jim Mokwa modify his engine. ![]()
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