OK, sounds like a good idea as this knowledge is worth sharing .... from what I know, 68 OEM seat foam had embedded listing rods, so when you tear yours down, how this was done will be readily apparent .... CJ Pony's site has a "tech articles" page (link at bottom of their home page) that has a general description of how to do classic upholstery install .... that article does describe some of the variations among the years which I found to be helpful .... for the 67 -- I have noted that the TMI sport seat foam front (traverse) listing location is not exactly identical to the OEM .... the TMI seat foam embedded listing rod appears to be set back (towards the rear) about 1 inch from where the OEM listing hold-down rod is located .... what I did was place the foam on the frame and stuck an awl through the foam next to the embedded rod .... the awl came out about an inch rearward from wher the OEM listing hod-down is located ..... I tried to attach the embedded rod to the springs -- but a swing and a miss ..... so I will next get some 1/8" steel rod and fashion another listing hold-down that will be located under the TMI front listing pocket and hog ringed to the springs .... I know, a picture is worth a thousand words .... so I'll snap a few pics as I go along ... will try to do this new hold-down thing todayafter a trip to a h/w store ..... more on this later ..... btw, I already did the entire rear seat .... turned out OK (not perfect, but good enough for me) ..... purchased replacement foam, but that turned out to be a major waste .... many issues with size and shape (but the quality looked to be fine) ..... so I ended up re-using the OEM foam (which was in surprisingly good shape) ...... the real hard part of the rear seat is getting the tunnel cover and lower back of the seat attached .... once past that, the rest went pretty smoothly .... the rear seat back was pretty much straight forward ..... more to follow ....
EDIT -- checked the backset of the TMI upholstery front listing pocket and it's a good 2 inches towards the back of the seat compared to the OEM location ..... also, noticed that the thickness of the TMI seat pad itself is thinner than the OEM seat pad .... hope that doesn't make the TMI seat less comfortable .... I'll be really pizzed if it's not as comfy as before (for what that's worth) .... time (and $$$) will tell .... so that's how TMI gets a higher side bolster -- the center section thickness is reduced ....