Thank you gearhead!
I must say, your the first person to shed light on this for me...I didn't realize 153 tooth=10.5" and 168=11" and weren't interchangeable! that explains a lot!

DuH, yes I will go to ORielly's and compare parts. I have my old 230/3 speed parts, will just clean them up and go compare!!

I feel like a dumb*ss now! Thank you again. Should be piece o cake.