So this weekend I did the swap out from the c-4 to the ford AOD transmission. One of the many problems I am having at this time is with the headers. As of right now the headers are hitting up against the oil pan of the AOD transmission. I am currently using Hooker Competition headers. Does anyone know of a decent header out there that will clear the AOD & crossmember? Any help would be useful!

 

Shorties, or FPA's http://fordpowertrain.com/FPAindex/headers1.htm

 

I believe JBA makes headers that will clear but they aren't cheap.

IIRC, the FPA headers for my car were priced around $500.

In the end I went with shorties for $149.

 

you can make yours work, read this thread
https://mustangforums.com/m_3989663/tm.htm