GM's "Other" El Camino

We all know that the El Camino line got all the cool Chevelle options-SS packages, cowl induction hoods, etc, etc. Maybe Pontiac / GMC dealers thought they were losing sales-whatever the reason-in 1971 GMC introduced a re-badged El Camino named the "Sprint". All engine options including the mighty 454 were available. It was a moderate hit-although I think most of the sales were to people who wanted an Elky anyway and maybe got a better price on one than at the Chevy dealer, or just liked the "GMC" badging and trim. It was the same in 1972, with most being 350 powered, but the 402 and 454 Rats were optional. When the "A" bodies were restyled for 1973, so were the El Camino / Sprint. The 402 was dropped, and the 454 lost 25 hp ( Down to 245 from 270 net ) but they got cool options like swivel bucket seats. Styling remained the same through 1977 although the 454 wasn't available after 1975. For a few years-1974-77 you could get a 400 small-block as an upgrade over the 350. In 1978 they were downsized and re-styled again, and the name was changed from "Sprint" to "Caballero". The standard engine was now a 3.8 liter V6.  About 400 lbs lighter than the 73-77 models that preceded them, these were pretty good performers if you ordered the 350 V8. After 1981, the largest engine you could get was a 305. The line soldiered on until 1987, and although Chevy El Camino models got the sales boost of offereing the Monte Carlo SS front end and trim on 84 and later models, no one seemed to care about the GMC cousins. When the Malibu, Cutlass, etc went front drive in 1988, the car / truck hybrid that had been a favorite of hot rodders since 1964 died an uneventful death.  The GMC models aren't really worth anything other than the fact that you might find a deal on a low-mileage "Sprint / Caballero" simply because not many people know they even made a GMC model, and the GMC models seemed to have been sold to older people who kept really good care of them, rather than the "Real" Elkys that have been butchered with Grand /Auto sunroofs, drag raced, and generally abused by their mullet-wearing owners and trailer-park Barbie girlfriends that couldn't afford a screaming-chicken Firebird or Z/28 Camaro!.  Mastermind