I installed a set of Corbeau VX-2000 leather seats and bases for my 68 Barracuda convertible. They are nothing short of amazing in quality, fit and comfort. I highly recommend them. I cut an inch out of the mounting brackets and welded them back up to lower them a bit, because I'm tall.
I bought them from Racing Seats USA. They are not the cheapest seats out there, but well worth the money.