[mickmate]

I find heads one of the best ways to ID them. The Windsor has heads that are cut off on the corner so the exhaust comes straight out the sides. The Cleveland has a bigger square head and the exhaust ports go down and out. The FE's are a smallish head with the intake going out into them about 1/4 of the head. There are also very good tell tales like the aluminium tag under the coil bracket or on a front cover that will tell the story. If you could get a picture, more numbers or more detail there is plenty of expertise to verify it here at CC.
Cheers Nick