"Main seal"? There's a good chance the main seals and drive system seals are still good, at least good enough to make it drive, assuming you get it running, which again, would probably not be too hard to do. Looks straight, not many miles, the BIG THING would probably be the sheet-metal flywheel and original hex drive for the ATF pump. All easily understood, well documented, and straightforward to fix. Both of my autos rounded off the hex at the same ~20k mile mark. My early Convert sheared the flywheel @ 17k. Might be smarter to find a running Convert for $1000k more that's had the nit-picky stuff done already. But it DOES have those cool wheels....