OK, parts gurus! My '64 Chero (and '65's) and '64/'65 Falcon V8's have an odd driver's side cast iron exhaust manifold that points DOWN rather than straight back like the passenger side. So, might '65/'66 Mustang OEM fit on my ride? Or does it conflict with the clutch bell crank? Anyone use later iron on theirs?? Dark Side Tom
Interesting point, I have 2 289's one is the way you described with pass straight back and driver side straight down, the other one has both sides straight back, the latter is the one I picked up that was donated to a school from FOMOCO. To answer your question, I have no clue, sorry.
Tom, you have the same set as what came on mine: I believe this is the set that came with a factory V8 with a manual trans & Z-bar. This sends the driver's side exhaust under the oil pan to join up with the passenger side and then to the back, a single exhaust setup. That's why we don't have a crossmember under the oil pan like the auto trans cars do. I've done some searching, and some say that this '65 Galaxie manifold MAY work with the Z-bar, but I haven't tried it and can't confirm it. At any rate, I'm pretty sure the Mustang straight-back manifold won't work.
With my truck group, we mostly had Ford FE engines. The right/left stock exhaust manifolds were always different. You had the starter on the passenger side, and the steering column on the driver side. Often, the driver side crossed under the tranny to the passenger side. I would expect similar concerns with any vehicle. Joseph
Here's the crossmember/brace I mentioned. Not a factory part, but could be used if you didn't have a manual trans and wanted dual exhaust: https://www.falconparts.com/ford-falcon-auto-parts/pc/1960-1965-UNDER-ENGINE-BRACES-V-8-p1151.htm