Car going in for paint, Resto Options

[Moose01]

I am putting my 6 in for a full resto. The paint is original, with little rust; however it is cracked and flaking off. So it is finally time. Mechanically it is pretty good, with a motor built by DeMan and some suspension work. The former owner auto crossed the car.

I do need a little advice:

Best place for new rubber, seals etc?

Shifting, .... I can shift the standard set up ok, but is the Rennshift worth it? I do want to autocross as well

Interior... The seats have a few tears, not too bad but need to be redone as the door panels, ideas?

The seat belts need restoration or replacement, is there anyone doing this?

Thanks

Chris