<<Actually 92 was the first year for the magnum 318 and 239. The 360 went
magnum in 93. But, there were no changes in the 318 until 94 when they
dropped 5hp due to changes in emissions.>>
92's and early 93's had bigger exhaust manifolds.
<>
I too agree with that "first year is fastest" theory.
My example is with chebys, I had an 86 DIROC,
my bro had an 85 Z28 (first year TPI), there was
no comparison, the 85 had a much healthier cam.
Marc Federici
99 SLT+ CC 5.2 5sp 4x2 3.55sg
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