Ronnie, Not sure if you saw it, but you might be interested in this
post in the Other Online Sources forum. The bearing listed as "907274" is what you need for your main input shaft/drive gear. It's a replacement number for the original GM# 954358 (New Departure bearing# 41209).
Maybe worthwhile to see about acquiring? The other bearings also for the SM420 could be useful somewhere down the road. Happy Holidays my friend!
