non-locking gas cap for 1975 (and other years??) I had to replace my lost cap and found one at O'Reilly MCS6817, which is same as Stant #6817, NAPA BK 7031231, and AutoZone #6817. This is a perfect fit and the gas door lock doesn't interfer, unlike the lost cap. The parts counter person looked up one for a 1975 Camaro and that is the on e I bought. Hope others will find this useful. Keven (kevenis@aol.com) Aug 2010