[kblackav8or]

As a 351C owner and enthusiest there are a number of accurate ways to ID the motor. Previously mentioned and correct would be the thermostat housing. There is a cast iron block extension, the stat housing bolts down on top of it. There is no aluminum front cover like on the W motors. Another easy way to tell is look at the valve covers, Cleveland valve covers loook unique and have different bolt pattern and I think more of them then a W. Next in the corner of the cover rail there will either be a 2 or a 4 cast in indicating the type of head. With the valve covers off the obvious sign is the canted valves which cannot be mistaken. Also this will eliminate the FE's since the manifold forms part of the rail. If the canted valves throw you check the timing cover again, if it has a regular aluminum cover then you have a 385 (429/460). I concur with earlier post. If this RV has the original motor it is most likely an FE. Ford made RV chassis though I don't know when they started. My guess is 360 or 390 with a C6. BTW Clevelands are great motors that have been besmerched by bad press over the years mostly from Chevy oriented ragazines. Most of the rumors are not true.