Hi Jason, the Y30 is a great car. I had one with a late model VG30E twin throttle body. The Autos are a tough box, never had any problems with it, even when I smashed the diff.
They are very truck like in their build. Big solid rear axle, big trailing links, big rails, steering box, none of this rack business!
This means that majority of parts from other models such as the R31, S13, etc don't bolt up. The diff is shared with the 720 ute as is the steering box and knuckles. The Front struts can be used from a Z31 'Californian' with 5 stud hubs.
Any VG or RB will bolt in.
Here is my old car. Crossmember was 35mm off the ground . 18' Lensos and a trimmed Volvo 244 GT front lip.