Here's my experience. I recently purchased a 73 from the original owner. It's a survivor and I plan on preserving it not restoring it. The interior was in great shape other than the drivers seat, left front carpet and the seat gummihaar cushions. I don't think the rear seat had ever been sat in and the right seat has seen very little use. I replaced the left carpet (thank you esty) and replaced all the gummihaar with dense foam. I don't recommend the blue gummihaar replacement stuff offered today. I went as far as to stuff the old gummihaar under the rear seat and in the seat backs so I wouldn't lose that wonderful gummihaar smell. So far so good.
What to do about the left seat vinyl? I sent for samples. No one offers saddle basketweave, World Up. sent a sample of black that they run through a machine and emboss which looked ok. I really wanted to avoid the dye route with black so I ordered the closest to saddle and paid for the embossing. Well that turned out to be a waste of money. I neglected to notice that the brown I selected was thinner than the black they offer. The effect was the embossing produced a very faint pattern. Fail!
Back to square one. Another issue with the embossed vinyl is you don't get the vertical embossed lines. You have to sew in the pleats, close but not quite right. My solution was to put an ad in the FAQ "Parts Wanted" section asking for the vinyl off the rear bottom seat cushion. It barely gives you enough saddle basket weave but as you can see I was about 6 inches short for the smooth vinyl. Since I needed the seats I just had my guy add the seam. I'll have to go back later and redo that small section but for now I have a recovered seat with original saddle basket weave. Now if you are doing both front seats you'll need to scrounge a lot of used vinyl.