Paul -
If nothing else (and there is a lot more than nothing you efforts on this project) you are getting a great indoctrination to working on belt-drives.
It sounds like you've installed the quiet-pak belt system, perhaps unintentionally. I can understand how that would happen if the basket drive assembly had the narrow pulley, as the other three have to be swapped to match.
The square motor isn't going to please the gods much, but WP will sell us a square one you if you need a replacement motor for most any BD machine originally equipped with a round single or two speed motor, and they've done that for years and years. On the other hand, you may or may not be happy with the performance of the machine, even if it all works dandy, because the quiet pak system removes most belt sounds and especially the woo-woo. You will have a very interesting hybrid machine for sure.
If you decide you have to have the original belt to make the "right" machine sounds, the most common basket drive assembly (which has a spin tube) you're looking for is part number 383923 in the U.S. --- they show up on eBay fairly often. This has the proper height spin tube, the fast brake, and a new spin cam bar for those machines that were not originally fast-brake. If the donor WP or the Ingliss's original basket drive pulley are able to be removed from the origial spin tubes, you could install one of those on the new spin tube and keep the old-style belt and sounds, you just get the fun of taking apart the basket drive.
By the way Paul, what washers are you talking about for the tub mounting, the 76673 tub repair kit or the 21365 originals? I have lots of the 76673 and I'm happy to share. Just send me an e-mail.
Gordon[this post was last edited: 10/23/2013-21:03]