727 casting numbers help

I was told it was an 85 model out of a truck so close enough but I was told it was a Trans from a 360. I have no way of verifying this without dissecting the numbers. It has the convertor and flex plate attached, is there any clues on those parts I can look at to know if they are off a 360? I know the 360 is externally balanced so there must be some weights on one of those parts correct?