I would guess at 40-50 per tire depending on where you are. For sale is a set of 5 Firestone SS P245-60-R14 radial white letter tires. The guy put them on the car just so he could move it around untill he got around to restoring it. I drove it to my shop a couple times and then removed them to start on the car.
They have been in storage since then. I would bet they don't have a 100 miles on them. The one was in the trunk and never on the ground. You can still see the nubs on all of them. Nothing wrong with the operation just might have minor imperfections in the white letter or the like.
They still have a lot of the coating on them from when they left the factory. I spent very little time cleaning them so with a little work these tires could look great for a lot less than new ones. The item "GTO CHEVELLE NOVA CAMARO TRANS AM CAMARO Z-28 1977 1978 FIRESTONE SS RADIALS NOS" is in sale since Thursday, December 10, 2020. This item is in the category "eBay Motors\Parts & Accessories\Vintage Car & Truck Parts\Transmission & Drivetrain". The seller is "ravjudge" and is located in Le Mars, Iowa.This item can't be shipped, the buyer must pick up the item.