delta88The Delta 88 remained the top trim level, but it was divided into the standard Delta 88 and the upscale Delta 88 Custom. The Custom was available only in two- or four-door hardtopVehicle history and comps for 1966 Oldsmobile Delta 88 - including sale prices, photos, and more. Find Search Listings. 796,741 Follow Markets. 9,281 Explore Makes. 661 Auctions. 1,192