To the best of my knowledge most Italian cars of that era painted the suspension components satin black. The Eastwood Extreme Chassis Black in satin provides a very nice match. Do yourself a favor and have the components media blasted, then paint them with self-etching primer. Eastwood does sell a black primer which is very good, however I still recommend using the self-etching primer first. The under side of the chassis usually had body shutz undercoating applied. If you are going to body shutz the underside, I recommend performing the same process as the suspension components. You can even use POR-15 before you body schutz the underside.
Thanks for your advice you confirm my own thoughts how to do it.
1952 1900 C Sprint 1959 Giulietta TI (Class winner Rally Monte Carlo 1960)1967 Giulia Super 1970 GT 1300 Junior 2008 159 TI SW