There is nothing to lubricate on Alfa suspension; no grease fittings. The ball joints are all dry, the bushings work by having the rubber flex. Yes, new bushings might help - the rubber will eventually crack with age, creating play. If something is broken around the shocks, or their rubber mounts have fallen apart, they could be contributing to the noise. The internals of the shocks last a long time and are probably OK.Car actually not really bouncing that much, just kind of noisy when hitting bumps, sounds like things need lubrication more than anything, otherwise drives great. Is this typical for this era Spider? would bushings help?
Never having ridden in your car, it's tough to know just how noisy it is. So maybe it's typical and maybe it isn't. I can say that older cars, particularly convertibles, are a lot noisier than modern cars. There is much less insulation in the body, the suspension isn't designed for low noise and of course the convertible top does little to insulate sound.Is this typical for this era Spider?