I am planning stgh to improve handling of my 82 gtsi. I thought of new rubber on 16" rims (I have trx at the moment), new shocks, new springs in this order. I think tires and shocks should do the most of it, and spring could actually be ineffective, due to poor chassis rigidity. My goal is just to have a level of grip/hanling comparable to a modern car (road use). Did anybody test the effectiveness of these mods on a quantitative basis (lap times on a given track or lateral acceleration on a skidpad)?