Feeling a bit pissed off with the S130 project so some thoughts about what could have been done with the 260Z instead, FJ20ET engine, Torsen type LSD, etc. Body was too flexy so.....anyway....this is what maybe could have been done to it, after seam welding the body etc. Ignoring engine choices but say 3-350 WHP for a dual purpose road/circuit car
Keep strut suspension but drop it all down, look at keeping roll centers around stock, rear higher than front for sure. Look at using S13 front X member and struts, lots of after market support and superior stock geometry, different strut bar location points not a real problem.
Not sure what would be the best way to lower the rear outer LCA pivot point but thats mere detail.
Brakes? Plenty of options around now, choices has really improved in the last few years. Wheels? Big 17"? Although in the US you have a wide range of 15" tyres.
Anyway thats enough, all I'm saying is that choices and potential for the S30 have never been better. Take advantage of it and build an arse kicker .