glad to help! your welcome!! its always nice to have a stock pile of extra parts around to either use or help with tech discussions.I knew it had to be in the back spacing. I just didn't have anything to compare to.
Thanks................Ted
I cant answer this question but, Why would they be different? Isnt it not the axle that dictates bolt pattern and not the backing plate?
difference is in the backspacing from the axle flange. using a straight edge across the back of the plate measure them... small bolt is roughly 1 1/4" backspacing and big bolt is roughly 1 3/4" see pics sorry they are crappy but should give you an idea what im taliking about hope this helps...