yes you can use a 4 cylinder stang.. and transplant the 351 C into it.
try looking over at
www.thecorral.net in their forums.. the 5.0 tech of 5.8 Tech (5.8 is the 351) .. register.. ask around.. finding the body is simple.. as you see above.. finding everything else is a little trickier.. but not too hard..
you wont look back after you go V8 dude.