Pontiac tech

You’ve got questions. We’ve got the answers—the Summit Racing tech department tackles your automotive-related conundrums.  M.J. Cadott, WI Q: I own a 1967 Pontiac Firebird coupe with a mostly stock 1971 400 engine. The engine is bored. 030 inches over, has 91cc heads (6X-4), and Hooker Competition headers. The car also has a 2.5-inch dual exhaust system with Flowmaster