I have a 67 mustang fastback
5 speed with cable clutch conversion.
D669Y Mustang DougS Headers Tri-Y 351W 1-3/4"-2" Stepped Design Ceramic Coated 1967-1970 | CJ Pony Parts
From what I can tell, they should fit smoothly, and should clear the pitman arm, and nothing else is in the way.
I DO HAVE A 69 MUSTANG, and I looked in the engine bay there, and everything that is close to the headers is in the same location as my 67 mustang.
SO if this fits in a 69 with no problem, it should fit in my 67 no problem.
I am looking into these headers for a few reasons.
they are mid length, so they will have nice ground clearance, as well as not being too high and hitting the mustang floor.
The angle of the headers just shoot down at the perfect angle, that they will not hit anything.
they have the 1 3/4 inch tubing
I like to check with you guys first, I don't want to spend all this money if I'm not pretty sure its going to fit.
I also read that tri-y headers are great for producing more power for the low rpm engines, which fits the 351w perfectly.
EDIT: the engine is stock (no aftermarket heads or anything)
Bolt pattern from center to center for the header bolts is 2 1/8 i believe (just did a quick measurement)
I just found that these headers also need a conversion of power steering bracket PN H7609. But I don't have power steering, so I can just ignore that right?
I keep searching as much as possible about these headers, and have only heard great things about them.