Even a correct low-back Blazer seat (with original brackets) doesn't "flip forward" all that well. IIRC it still hits the windshield and doesn't really give you all that much clearance to climb into the back seat either. If you have a lifted truck, it's incredibly awkward trying to climb into the back seat through the passenger side door anyway.... much easier to just grab the rollcage, climb on the rear tire and throw a leg over the bedrail.
Ultimately, I just gave up on the factory mounts and built a set using the modern Sparco tracks so that both the driver AND passenger seats could slide forward and back as desired. The factory mounts never allowed me to slide back far enough on the driver side to be comfortable, but with new mounts the seat goes WAAAY back and almost hits the rear step-up area at it's maximum setting.
-G
