I used to have a Holden nova. Carny auto . I rebuilt and Fitted a 4age red top with blue top cams and messed around with the sensors So it kept on giving it a heap of fuel. I kept on adding timing until it didn't ping at idle. It had a. 20v c52 limo diff box from a black top which I managed to get my hands on whilst working at a import shop. New superpro bushes all around and up rated sway bars front and rear will make it Into a new car to drive, I used to run 3deg neg camber on my Corolla, and I still used to chew the outer edges of the tyres around. It was super quick thru the corners and went thru tyres and brakes about every 6 months. I ran ae101 coil overs in the front and Kyb and jumbo springs (Liverpool) on the rear. 1.5" lowered all round to keep normal look. Where is your location and what's your driving style why are you wanting to upgrade? If your smashing corners 247 I'd stay away from pedders and get coil overs so they can be rebuild at a fraction of the cost. Drop me a pm For further info.