Maybe the 68 seats are easier
I've got ACI foams, going to try just some jute and thin padding beneath, then foam, then covers. Will try to follow a combination of Rambows how-tos and the Legendary installation videos.
Local shop wants $850 to do the job with all the materials supplied by me, not a chance I'm going that route.
Recovered the rear using the original covers with all new padding, turned out ok.