I bought a 94 gr8 about 4 years ago and I'm ready to do some work to it. It has some aftermarket parts installed already. My question is how can I figure out what size injectors it has? It has a trick flow plenum. (I guess that's what it's called. Big thing on top of engine). I'm assuming it has a 75mm throttle body. And how can I tell the gearing in the rear? Guy said it had gears but didn't tell me anything else. This was 4 years ago also. And is there a way to tell how much it has been lowered? It has strange shocks in the rear. Not sure about up front. Thank you

mark the drive shaft, spin the tire 10 times slowly, count driveshaft rotations, this will give you an idea of gear ratio, I think you could spin the wheel one full rotation and get the same results but it's more fun for your friend to try to count that many times,