sketts. i am 110% sold on the racing suspension seats over any others. Instead of a rigid frame covered with foam, these style seats have parachute cords stretched across the middle, so you feel like floating on air not sitting on a bucket. Some brands are Beard, MAsterCraft, and PRP Racing. I recentlt mounted a pair of PRP seats in the 78 Bronco that I bought for the 84 a few years ago. I did have them bolted up to the 84 bucket seat frames while i was building the rollcage, and made mounting tabs on the cage to bolt the seats to. The mounting tabs on the PRP seats point down vs being flat on the MC and Beard's. I just fabbed some angle iron mounts for the 84 bucket brackets, and welded a few tabs to a bench seat frame for the 78 Bronco. You can check out the PRP Racing website for a direct-fit seat bracket.
Just an important note: Anytime you mount aftermarket seats to the stock bucket seat frames, check the passenger-side for clearnace with the windshield when the seat is flipped forward. My PRP's were OK, but I've seen a few busted windshields on other Broncos, JSM84