Will a 351m/400 Performer intake fit on a set of 351c 2v heads? Are the headers a bolt up also?

 

yes they are a direct swap, your only concern will be emissions is you have to worry about them

 

It all depends on what engine the 351C heads are on. If they are on a 351M or 400, yes, it bolts right on. If it's a 351C engine, it won't. The 351M/400 blocks have a taller deck height than the 351C and thus, the 400 manifold is wider.

 

I agree with scroob,100%.