Stock 340 manifolds value

"REAL" 340 manifolds, are 68-70 340 HiPo manifolds. P2863549 right P2863553 left.
They are fetching from $400-$500 depending on condition. Sad, but true.

In 71 the 340 came with the same left P2863553 manifold, but went to a more restrictive P3418623 on the right. This is why people have used the HiPo left side manifold, and a magnum manifold on the right.


If you have a set of real 340 HiPo manifolds, they will wake a 318 up nicely. With a 4bbl intake, and a nice dual 2.5" exhaust, you will be pleasently surprised. Will they out flow a nice set of TTis or Dougs, no way.
But for the simplicity of bolting in, matinence, and performance, they are a great choice.