['68OrangeSunshine]

Thanks for the replies, guys.
I'm tending toward new seats, as going thru the Frame/Foam/Upholstery/Mounting etc. is going to take forever and cost a mint. Not heading to the K/5 Concours, this is a daily driver I use for work. My only runner just now.
I looked on Jegs and was unable to pull up bucket seats typing in GMC. It went to Jeep by default. Going on Summit's website, I got the opposite, with 1500 selections, but nothing right, or in my budget, so far.
Funny, in my '68 C/10 Orange Stepside, I've had a '69 F*rd T-Bird bucket back/bench seat w/electric controls since 1977. The Ford seat sits on 4 long legs of threaded 9/16'' [or 5/8''] studs that go thru the floor. A stop nut and large diameter washer is needed on top, and more nuts and washers underneath. Due to the 30 amp draw, the electric switch is not connected.
Looks like F*rd copied GM mounting the Bronco seats.

I'm interested in seat frame brackets that fit the OEM holes, to which I can mount Procar or TMI or other, ready-made lowback buckets.