The factory Rallye only came in 2 sizes, 15x7 and 15x8, and they do not match. The 15x7 only came in the 5x5 bolt pattern, and was used on 2wd trucks up to '87, G vans up to '94, and there was a special edition Caprice that had them in the mid '70s. The 6 lug only came in 15x8, and was used from '73 (Blazer only, all 1/2 ton after '74) up to '87 (pickups, Blazer and 'Burb used them to '91).
