Hi, will 1973 mustang 351c 2V heads/intake fit on a 1970 315c block that had 4v heads? Thanks

 

opps meant 351 not 315

 

It will work. If this is not going to be a complete rebuild I'd also check into what compression ratio you will end up with. There should be some swap comparison charts around if you search the web.

 

Your compression ratio will depend what your short block originally had open chamber heads or closed chamber, and what cc heads you have to put on it. BEWARE i have run into a lot of 351C head with cracks in them check accordingly.