Opinions on this '68 Barracuda

The seller didn't build the car and has only driven it a handful of times, so he doesn't know the ins and outs of the car. He just recently bought a Duster that he really wanted, so he's selling this to buy a house. I'd feel a lot more confident about buying it from the builder, but if its a good deal, I'm sure I can correct/change things as I need to.

It has an 8 3/4 rear end, but he wasn't sure on the ratio. Unknown transmission.

He did say that the body/frame is in good shape. Some pitting here and there, but no rot.

Is there a page where I can see a good comparison of the year differences? I recognized the side markers as '68, but I haven't looked at enough to know any other differences between the different years.