i think the question is not about how you can build the 68-70 platform------but how did they run with all stock components------stock bars--stock brakes--stock motor---------the stock C body police unit with the big brakes---the big torsion bars--the big engine (and sometimes with special police carburetors and cams) is clearly the winner---and remember they competed against the hot B bodys with similar equipment-----if you remember the 69 belvederes were nicknamed 4 door roadrunners well because they ran like them----and the stock 69 police polara beat that belvedere on a pursuit road course backed with a pursuit city course-----and before we go into a dark place about a good driver had a good day and skewed the results---the LAPD guys had 4 drivers lined up and each ran the same car 8 laps then handed off the hot car to the next driver----so all 32 laps were run on an extremely hot car---sometimes so hot the brakes caught on fire---then that car went immediately to the braking test area where the panic stops and others were recorded-------i would say this test was an acid test on the equipment--------on the wagon quip----yes our PD had a couple big fury wagons with a load of crime lab equipment and one particular technician named dave foster would get out and run those big police chases just as fast as the patrolman.......case closed----maybe--maybe not....