To determine if it is a windsor or not is easy. First, look at where the top radiator hose enters the block. If it enter at the intake then is a Windsor. If it enters directly at the block below the intake then its a Cleveland. You can also tell by the valve covers. The top of the covers on a Windsor are flat and the Clevelands come to a point almost.
The is a code stamped on the block (I forget where) and one of the digits denotes the year it is.
There is also a 351M which you don't want to build. They're junk!!
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'82 GT 351W C-4,BBK headers,Carter 625 carb,Comp.Cam,Flowmaster exhaust.
1988 GT...T-5,bone stock
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