Having run 275/60/15's on numerous vehicles for more than 30 years my favorites were Les Swab Grand Prix's but, I don't have any recent experience with them as I swore to never give Les Swab another dime about 8 years ago. Since then I have run Coopers or BF Goodrich tires.
I have found that the Coopers will last 5 to 8000 miles longer but, they have poor grip in the rain compared to the BF Goodrich tires. Living in Portland Oregon means the BF Goodrich's are installed on my daily driver Burban.
P.S. Your 503 short wide is beautiful!
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Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help.
RIP Bob Parks.
1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo
If it breaks I didn't want it in the first place
The WMB repair thread
http://67-72chevytrucks.com/vboard/s...d.php?t=698377