Back in the 70's in the "GMC Truck News Magazine" there was a shortened 64-65 GMC Suburban on a Blazer frame. The truck was modified this way by an owner of a GMC dealer, I think his name was Walt Camire, he also did DH478 conversions. I may still have the magazine and if I find it I'll scan and post a pick of it. It looked considerably shorter than the two 65 Blazers do and the top was not removeable and it had the Chivy hood.