You should be able to remove the 2 lower attaching bolts and lift vertically up on the seat as there 2-3 hooks on the back side of the seat holding it in place.
It has been a while since I took mine out but here is my suggestion. Take out the seat cushion. This has two bolts just where the carpet meets the seat bottom, you have to push back and up as I recall. The seat back is on with 4 hooks, two up and two down. I think you push up and out to release the lower hooks and then the top ones are similar motion. I remember having a battle with it too.
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Ray White, Toronto ON
Formerly - The one and only 1973 LeMans 454 "Astro-Jet"
