Tire Pressures?

The info is in your red owners manual, and on the door sticker (both of which are still available from the Pantera vendors). Assuming you still have original tires, I advise you to get them off your car if you expect to actually drive it much. 29-year-old tires are unsafe to drive at the speeds a Pantera can attain, and there are other, better, newer tires around than the hard, slippery and narrow belted-bias Arrivas the car came with. A few years ago, I drove a show-winning totally stock Pantera in an autocross, and IMHO, the car was dangerous at anything over 1/3 throttle. Good luck.

I've just looked at the sticker that's on the passenger side of my Europ 72 GTS : it says
Front : 185/70VR15 28psi
C60-15 28psi
Rear : 215/70VR15 26psi
225/70VR15 26psi
H60-15 26psi
GR70-15 26psi

Anyway the arriva aren't safe tires on a pantera.
Hope this help
Thierry