Thanks for the bolt specs fish. I haven't had any luck at Autozone or Advanced Auto for the bushing. O'reilly is ordering an AT bushing that sems to have the same dimensions (noted in their computer) as the one I removed from my 4spd. I guess I will see when it comes in. I have not tried NAPA yet.
In case anyone wants it - here is the right part # for the BW T-10 extension housing bushing. It took some research to figure it out. Autozone, NAPA, Autozone, AdvancedAuto, and Oreilly did not carry this part.
Summit is a great company - but they could not even verify the bushing would work. I had to contact their supplier to make sure. Now all is good - just need to get this trans back in. Weather is great here - low 70's and sunny.