Looks like you have a basic standard radiator for a manual transmission. Would guess that the side straps are wide to the sides also when compared to what you normally deal with. With out the brazed on tag its going to be difficult to be real specific as to part or engineering number
Here are a couple of examples where the top tank matches what you posted. Unfortunately don't have pictures of the lower section of each handy
Hope this helps in some way
This one is in a later 67 A code Mustang