66 Dart GT HT Whatsitgonnabe?

65 Dartman said
They could be warped a bit - I'd have a machinist plane them true after you pull the engine to refurbish the engine compartment.

360DartGT66 said
Mounted it to the car and started her up. A LOT worse than before! :D I think I took so much off that the bend on the manifold that goes around the steering column interferes with the block or the cylinder head. I'll look into it tomorrow.

I did get a taste of what the engine would sound like with open headers, though. Not too shabby. :D
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I guess the head could be warped a little bit on the face where the manifold bolts to the head. I had the machine shop check gasket area where the manifolds bolt to the head on a slant head and it was not flat! A pass or two with the mill took care of that!