[gtv27]

As per above, either get the springs the length you want at the rate you want, or get as close as possible and put in spacers. My car is about double the standard spring rate but sits at standard (euro/aussie spec) height. I made some 10mm donut shaped spacers for the rear to get the front to rear rake just right. Recommend put the spacers onto of the springs as the bottoms are shaped and the tops are flat.

Shocks will not do anything for limiting roll (when, maybe rate of roll, but not extent) or impacting on speed bumps.

You can have a oval shaped section made for your exhaust to reduce grounding - I had that on my 75 as it couldn't drive over a white line without dragging its guts -very annoying.