Hi Marc,
1) I think most of the seals are a DIY project, but some are not. The rear output yoke requires a big socket, and I'm not sure how we'd brace it to loosen it, etc. The seal kit will include some extra items you don't need but it's easier than attempting to buy all the individual seals.
2) It's not Adsitco's transmissions, it's the company itself and their policies and business practices. I think there was a thread or two about them on this forum (try searching). They offer nothing that we can't buy elsewhere, from more reputable companies, at the same (or lower!) prices.
3) Yes, they quoted 3.0-3.5 hours if I deliver the transmission to them. Otherwise it would be an extra 5 hours or so for the R&R, at $80/hr (labor rate will vary greatly depending on your location).
