Locost Haynes Roadster Anti-Roll Bar

What size anti-roll bar do I need? Can I just use a front one or do I need a rear one too? Do the stop understeer? What about using stiffer springs or different suspension geometry?

Push Rod Anti Roll Bars

Push rod anti roll bar suspension systems benefit from rise spring rates, yet only a few cars have ever hit the road with Le Mans or F1 style anti-roll systems.