SOLD!
AAM 370 gear for $550.00 plus $50.00 shipping in unopened box. From RPM Transmissions, Decided to go with the 433. They have this gear listed on Ebay for $850.00 plus $50.00 shipping.
http://cgi.ebay.com/ebaymotors/ws/eB...tchlink:top:en
(I assume the gear they sent me is polished but box still unopened. This was the only gear they would provide a warranty for because it is used by GM (OEM Gear) in some of their vehicles.)
(Correction: Mine is not polished.)