I bought a funco gen 3 about 8 years ago and have been changing a few things on it. The biggest change in the handling of the car was adding ping tanks, something had to be done about the rear end hopping, kind of spooked me a bit. They are 1/2 gallon capacity. Initially I had 3/8" lines between the rear bags and the tanks. It took some of the rear end hop out, changing to 1/2" air lines and backing out the bottom compression bypass added slow body roll but helped in the medium whoops. The ping tanks have a similar effect of adding a larger air bag. I run 42 psi in the rear at ride height, that increases dramatically during compression. When the air bag rebounds the 2.5 bypass shock has a hard time slowing it down. I know some of the high end cars are using 3" and larger shocks, this was not an option for me. Just trying to share a little info with others. There are more than a handful of gen 3's out there, and great cars! Love them funcos!!!