Bucket seats

As long as they fit and work then go for it. Doubtful you will have the luxury of having the bolts align with any brace underneath so I'd be tempted to maybe just make up some plates to use underneath and then bolt them in using large body washers etc. Just to spread the load on the floor and try to make sure not to fatigue it. Think that is probably the most important part. Oh and I'd seal everything once tightened in. I did read somewhere that silicone was not the way to go though as it held moisture or something. Could be remembering that wrong. Anyway, think I'd make sure it had a good coat of paint and then undercoat it or something.

Best of luck with them. I'd double check clearances, alignment, height and also pay attention to where the studs would come through. Oh and once the seat would be mounted and it drops down the height of the studs (as you sit them on the floor pan to look for clearances etc.) does the seat still clear. On the bright side, if they don't work then Chevelle seats seem to be going for good money from what I've seen lately. At least you could maybe sell them and get enough money to purchase some Dart seats.

Cheers