Firestone quit making my favorite Skylark tires (Indy 500s). Who still makes good tires for these old Buicks that provide high miles and decent grip?
If you can't find BFG Radial TAs then check out Mickey Thompson. http://www.mickeythompsontires.com/street.php?item=SportsmanST
Got mine at Discount Tire last year They had $100 off a set of four tires P255 60 15s all around for $500 installed and balanced
Just put the Cobras on my ragtop - great 2nd choice behind the BFGs in cost - only have about 300 mi on them but happy so far