It's not a hard job but can be challenging.
Attention to detail, proper tools and supplies helps immensely.
Contact Ben Rambow for the padding, springs, seat kits.
(425) 765-3023
ben@classicseat.com
https://www.facebook.com/ClassicSeatRestorations/
If your budget allows it, buy Legendary seat covers.
The design of the 65 GTO bucket seat covers is specific to left and right. Make sure you have it right before installation.