i have a 69 vert with a 351C with 4v heads. it has headers on it now but i am wanting to go back with the stock manifolds. my questions are... is there a difference in the 2v and 4v manifolds? are they interchangeable? will they fit inside the engine bay without modifying? and are there any suggestions on where to start looking for them?

thanks.

 

I didn't think Ford put the 351C in Mustangs until 1970. Are you sure it's a "C"? My 1969 Cougar had a 351W.
Yea "C" parts are hard to find. I've seen stock reproduction "W" headers but nothing for the "C". What is the objection with your current headers? (too noisey, leaks?). Maybe some better quality shorty headers would do the job. I read on another thread that
ceramic shortys aren't so noisy and the quality headers don't leak if you get the thick flanges, quality gaskets and nut locks.
I have the stock headers on my 351C 4v and was thinking about changing to headers. (although I'd probably keep the origionals, sorry). Maybe post some picts of the 2v and I can see if they look the same.