The point I made is that none of that is unique to the Grand Sport. There were 1000 Grand Sports made in 96, so they're pretty rare as complete cars, but the suspension parts aren't unique or rare. IMO saying it's from a Grand Sport doesn't really mean anything. The guy who parted it out probably made a big mistake.
Sounds like you got a nice setup that's in good shape. I've bought several suspensions with only 50K or so miles on them, but the bushings were still somewhat distorted. These cars are 20-30 years old and deteriorate just by sitting. And a lot of the corvette guys went to urethane bushings just to improve handling performance.
I doubt you're only an inch higher than mine, but maybe. I don't think I'd have plenty of toe rod clearance at only an inch higher ride height. Even Newman uses a dropped toe rod to clear the frame...so does SRG and others. You also need to plan on smashing the axle bumper to some extent, probably on the order of half it's height. My standard setup sets the rearend at a 2" suspension drop from stock height and the front at a 3" drop. The batwing is only about 1/8" from the bottom of the frame. To me, lower is better because it lowers the CG and makes a better handling car and most guys want them as low as possible these days. I don't know how far Rick drops the front end, but again lower is better with the high CG of these cars. My frames sit at 4" off the ground at the low point which is comparable to make newer sports cars and is driveable. It will work at a higher ride height but won't be optimal imo.Yes the rear might sit an inch higher, but NO mods needed to the suspension, or floor pan, and will have a very usable ride height.
Rick's frames are clearly an exact clone of Newman's frames and I'm surprised Newman didn't go after him for some sort of design infringement. One thing I never liked about Newman's crossmembers is that any sizable exhaust tube is going to hang below the frame. The AME center section eliminates that problem, while significantly stiffening the frame. Bolted in crossmembers do little to stiffen a frame either torsionally or longitudinally. The other thing many of my customers didn't like was the inability to use coilover shocks if they wanted to. You're stuck with the Corvette spring offerings because the shock mounts won't accommodate a coilover. If you just want a cruiser, that's probably not an issue, but for best performance picking the right spring rate is important.