From fordification.com:
C6ME-A These are all possibles:
'66-'67 410 c.i.d.
'?? 390 c.i.d.
'68 - '76 360 c.i.d.
'?? 359, 361, 389, & 391 c.i.d.
'66-'67 352 c.i.d.
'?? 330MD c.i.d. Medium & Heavy Duty Truck
'66-'70 428 c.i.d. 428-4V, Police Interceptor, Cobra Jet, May Or May Not Be Drilled For Hydraulic Lifters… Look For
Oil Galleries
The heads seem to be kind of a universal 390-428 head. Google the number it's self and see what you come up with. Here's an example:
http://mustangtek.com/heads/Heads.html
Steve