Quote:
Originally Posted by rexs73gto
A 70 G/P with the 455HO would have come with the long branch exhaust manifold & the 2 1/4" exhaust pipes. Otherwise if it were just a plain 455 it would have come with just 2" exhaust.
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Incorrect.
'69 428 HO GPs came with the long branch manifolds and 2 1/4" head pipes. All '70 455 GPs came with log manifolds and 2" head pipes.