Please help me ID this Big Block Ford Engine

[pintotony]

Please help me, I am losing my mind! I bought a 73 Mach 1 parts car and cannot id this engine. It is a big block with a c6 in it. I need to know what it is to sell it. The cylinder head id says C6TE6090-0 or C6TE6090-G, I cannot make this out. This is a 4 bbl engine. My cellar is full of 71-73 Mustang parts but do not know anything about Big Blocks. (The car was advertised as a 351 Cleveland!) and to my surprise when I opened the hood, I knew it was a big block.

[427]

Im not totally sure but one of my books says possibly an F.E. motor. It could be a 390 or 428. dont think that engine came in the car but could have been changed out. Hope this is of some help.Brian.

[fordman]

big block 429 460 right. the 351m also has some of the same charcerteristics of the 429 460 engines. http://www.fordification.com/tech/engineID-V8.htm