[font size="1" color="#FF0000"]LAST EDITED ON 07-Jul-00 AT 03:17 AM (EST)[/font][p]I have an engine in a Bronco I have had for years. This is not the original engine, but when I purchased it, the original valve cover has the cid as 400 c Is this some kind of a cleveland engine? Im not sure of the year but I was thinking it was a late 60s vintage. I hope someone can shed some light on this question . Detroit

 

You'll have folks argue until the cows come home as to whether it should be just a 400, 400M or a 400 C.

Chances are you have one of the early 400s from the early early 70s before the 351M was even thought of. All 400s and 351Ms were derived from the basic 351 C design. They have taller deck heights, different crank journals sizes, different motor mounts, and big block bellhousing bolt patterns as opposed to the 351Cs smallblock (except for some of the first 400s produced in late 70 - early 71 with FMX trannys that had the smallblock pattern)

Anyway, Ford actually designated some of these real early 400s with a C but they are no different from the later ones unless you have one of the small block bellhousing patterns ones. Internals should still be the same.

Later after Ford dropped the 351C and their were not enough Windsors to keep up with demand, they destroked the 400 to make the 351M (M for modified 400) to help out with demand. Soon afterward folks started to refer to the 400s as 400Ms when nothing changed.

Anyway, I guess you did not ask for an entire history lesson but I hope it helps some.

Eric B.