buying new

Guess nobody has any laying around so buying new ones...\

Looking to buy some drag radials for my 68 cuda fastback with stock location rear leaf springs, has 8.75 with BBP and 15x7 wheels with 4.25 BS they told me I could go as big as 275-60-15's? I would like to stay on the safe size and go with 225 to 265-60's or 50's X 15 let me know what you have. PM brand, size, condition including if they have sat outside, have dry rot or sun damage and price with shipping to zipcode 81507 in Colorado. Not interested in worn out or ones that have been sitting outside awhile.