The rear suspension is 1996 318ti. This was chosen to obtain the correct bolt pattern and wheel offset. E36 Sachs coil over kit was installed to make use of it's ride height and weight distribution adjustments. Also, the spring rate is slightly higher relative to the chassis weight of an E30. The 332is has been sold, but Zionsville Autosport can still make your E30 into a low profile giant killer.
Kits are available for purchase in the new parts section.
For the slightly more eccentric, we can hand build an E30 M3 Convertible with the Twin Cam Conversion.