I've been posting pictures from the '66 resto here:
1966 Convertible Engine Bay: hidden wiring, big radiator, shaved holes, etc!
Since you can't change titles on VMF, I didn't want this how-to posting to go unnoticed.
So, here it is!
After stripping your old seat frames, and checking for cracks that might need welding, give them a good coat of primer/paint:
Depending on where you live, set the new vinyl outside for a bit. In southern CA on a warm, sunny day, an hour will suffice.. maybe less. In the Pacific Northwest, you're better off with a halogen shop lamp
New foam is CRUCIAL! Don't skimp. And don't buy the cheap foam. You'll also need a few hundred hog rings, hog ring pliers, and some pretty hefty wire cutters in case you need to remove a hog ring.
You'll need to lay down some new 'burlap' - in this case, I use vinyl remnants.
Foam goes on next. Nothing tricky here. Just make sure you order the right foam for the right seat (it is different for standard vs deluxe). And please, I repeat, BUY NEW FOAM!
With the new vinyl turned inside-out, install the wire listings. Even if the old ones were re-usable, they were for std seats; deluxe seats have a different layout. I like HEAVY coat hangers. Cut to size, bend, and make loops on the end.
Make sure everything is lined up. I've seen a lot of crooked seats at shows.
The listings go down in the crevices of the foam. You'll need to use one hand to shove them in place, and another hand on the back of the seat (or bottom of seat) to attach them with hog rings.
Start at the inner wire listing. BE careful not to let a hog ring go too far and puncture your new seats.
Carefully lay down the rest of the cover
And keep on hogging
And now comes the fun part..