I made these exceptional 10 & 12 bolt GM car rear end covers for many years, & sold retail & to dealers. Fit 1964 thru most 1982 GM cars. Think might drill for S10 also. The co. I used to cast them quit doing that kind of work. So, make your own covers . Great market now for Nova's, Chevelle's, Camaro's, all GM Cars as noted. All that's needed is a foundry that can pour the covers. Sample of each included. Retailed for $79 to $99 each. Both patterns : $1500 for all. + boxing & shipping or can pick up. thx, Alan 336 302 6091 text ok.