David Chertoff
World Discounts
716-447-9066
EXT-107 http://www.wdautoparts.com/
World Discounts Auto Parts
1635 Elmwood Ave.
Buffalo, NY 14207
716-877-2458
800-288-6728
I found out the following sizes are now produced.
4080810, 4080815, 4080820, 4080825, 4080830, 4080839
Goodyear does not publish their catalog on the web.
Whipple 3.5 Upper, 2 LB 8.0" dia. Lower w/ 4 Metco Idlers (3-100 MM & one 90 MM) plus larger pulley on alternator takes 4080810 with tight fit, 4 lb 8.5" dia. lower should need the 4080820.