GET ONE!! Here is my 76 280Z. It was my mothers originally. I've done tons to it...full suspension (tokico shocks, springs, front and rear sways and strut bars, urethane bushings), Discs front and rear, and the engine is a built up N/A around 250-270 horse with programmable FI. Also lots of interior/stereo, clutch, tranny etc etc and too many things to list.
It's a beast...way faster and corners much flatter than my Si. Love driving it. Needless to say it is a little less practical than the Si though! (and the mileage is not even close) I have plans to turbo it in the future. It will be a real tire smoker with 400hp and 400 torque at around 2700 lbs (a 240 would probably be 2500ish lbs similarly equipped but with a more flexy frame)