383 exhaust manifolds

[browndevil]

I want to put a new exhaust system on my 70 Challenger 383 with auto transmission. I want to get a set of manifolds taht are correct for a challenger. It currently has casting number 2843992/2806900 which are not correct. From what I have been able to gather, it should have 2951865/2899879 but these seem to be harder to find and more expensive. I appears that 3751068/3751071 will also work and these are easier to find and cheaper. I don't require date/numbers matching. What is the physical difference between the two sets? Is it a difference in clocking of the mounting bolts? Any help would be appreciated.

Thanks,

Michael

[ted]

just have the pipes made for the manifolds you have.

[Chryco Psycho]

they all basically look the same , the clocking of the flange bolts changes

[cdawg]

The Late 1971+ have a larger crease on the upper edge of manifolds . Other then that...the manifolds physically are the same as the 70-71 production. I have a very good 1971+ pair with no pits if you are interested!