I bought this on eBay. It was supposed to be a NOS main shaft for an SM420. It turns out it is NOS but not for an SM420. I'm betting its still a Muncie part. So does anyone recognize it?

Photo - SM4?? main shaft

Once identified I will relist it for sale.

Thanks
Walt L. Williams
La Verkin, Ut

Last edited by 54Belair; 10/20/2015 3:26 PM.