Shocks

Its not difficult to replace the shocks on the Z31. Gabriel shocks with lower springs.....mmm…not the best combination of spring and shocks to have. The only advantage you have is that Autozone sell the shocks with lifetime warranty, so you won't spend money replacing the shocks. I will recommend you to buy good shocks when you can like Tokico, Bilstein or maybe KYB. Gabriel shocks are sell to use them with stock(OEM) configuration so if you install lower spring they won't last. I believe the guys here will tell you almost the same.

Yes you can use them but they are not performance friendly. It is an easy install

Oh alright..
Well I bought them for now because they were so cheap, and when i hit 55 the rear end loves to shake and wobble and it scares the shit out of me..
A few of my friends suggested cutting my springs the "right" way..but the right way is buying springs so I'll either save up for them, or cut them cause I really wanted it lowered.
If I cut them, will it be a horrible ride until I can afford new ones?

Your rearend is most likely wobbling because the control arm and crossmember bushings are shot. Also check the rear wheel bearings.

+++++1

An YESSS........the ride comfort of the car will suffer if you cut the springs. Maybe at first you won't notice to much difference but your car suspension will scream in pain......lol.

Plus when you lower the car your camber is going to be off and you will need to spend time/money fixing that.

The shocks are great now that I got them on, no more wobbling, so I think the bushings and control arm are okay. the old shocks were so shot that when you hold them in the air gravity itself pulls the top down....so my car was practically sitting on springs the whole time..
I really want to lower it, but I think I'll just wait and get the right springs/shocks for it considering I want the baddest Z in town.

Cool.......good luck on your quest for the baddest Z in your town.