Nec Z32

Well I just picked up a 1990 NA 2+2 Stick, Pearl White Z. The Car belonged to my dad. The car runs well and is basically stock. My dad sold it to me cheap because he bought a 370. The Dealership he went to was gonna give him 1800 for trade, so he sold it to me for that much. The Dealer has done pretty much all the maintance on car since my dad picked it up in 03. The car has 168k miles and has had everything done engine wise since my dad has had it( Head gasket,timing belt, water pump ) But i was wondering if i should start looking at full rebuild kit so that i can continue to drive it for years to come. Side note the suspension is also probably needs a freshening up, it feels rather soft compared to when my dad first got it and on the hwy it shimmys a touch over road joints/on of bridges. besides new shocks and springs is there a master bushing kit out there that will bring the car back to a tight feel?