My idea centres around a LSx engined Chrysler Crossfire or Mercedes CLK C208 coupe, the latter can be bought for a few K and is the pre Mac strut lighter CLK model. It, like the Crossfire which was derived from the same platform, has multilink rear and double wishbone front suspension. Of course any of the usual Nissan culprits would do too but I like the development part and wasting money
S30's are just too expensive now to mod in my opinion, another 280ZX shorty would probably cost $50K all up or more for what I have in mind. For a Sports Sedan a minimum 50mm vertical height difference between the main cage hoop and the driver's helmet is required which knocks out S30's and probably my 280ZX too, Crossfire for sure, the CLK C208 maybe?