[Coley]

Interior looks good !
As for the Highlander option, I think it was a '72 option only and it looks like you have a '71 so you might be a year early for that.
No problem tho'...it looks like your seat was redone at some point and apart from the steering wheel, it looks pretty clean and stock.
If you decide to put the seat back to stock fabric that is available from quite a few sources all in a pre-sewn and fit package.

Nice truck tho'....hard to find them in original condition like that.

All good
Coley