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bosch platinum
Factory plug TYPE is R45Ts plug. Gap is 0.045
0.060
Depends on the power to weight ratio, but typically if its over 350 horsepower it probably can be called "high performance".
1976 Gmc 4 wheeldrive 350 engine
Might get a slight improvement in performance up to the limitation of the coil's ability to jump the gap.
Probably not.
The spark plug gap should be set a .045" With an aftermarket coil gaps can be increase <.060"
Most people think that they gain more power from putting a 327 head on a 350. unless you get a head that is a high performance head you are not changing much.
sure, it's the same thing.
Not that well. The valves are too small for high performance use, and the combustion chambers were too big.
AnswerThe spark plug gap is .035 on a 1993 GMC 350 TBI.