Hey guys! I want to update the passenger seat so that it moves. I have to update the mounts on the pan correct?

I have a spare 76' laying around that is gonna be a sim car, can I use those?

Anyone have a process?

Yes, you need the seat mounts and the dog tooth looking thing that goes on the frame support across the front of the seats also from a later car. I had this done on my 70 also. I didn't do it myself as my welding skills suck.

Looking back I could have done it. just take the measurements from the 76 and plot them out on your 70 then and

Also you will need a later style back pad once you are done.

Before
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After

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Got the backpad and the extra seat! Is it just spot welded on there? I mean, is it just a matter of drilling?

Its really up to you. You can either spot weld it in or seam-(butt weld it in) meaning weld the whole perrimeter of the seat hinge. After wards por-15 the crap out of it and use self etching primer followed by a couple coats of paint and you are in bussiness. The front rake adjustement slider teeh are both bolted and welded in place just pay strick attention to how it is installed in the car you pull the part out of and carefully measure the car you pull it out of(use the other car as a template)

Not 100% sure they are spot welded, but they would almost have to be. I know replacement floor pans don't come with the hinges.

They are spot welded. Just drill out the spot welds to get the hinges out,just try not to bugger them up to bad so that it makes it easier to reinstall them later. The best way to get the other(forward) piece out is to just cut it out and trim it to fit the car you are putting it into.