Where is approximately the best tire pressure everyone has found on the 275 40 or the 315 35 17 inch drag radial? I know on my L i ran them at 22psi and that worked okay at the track but i would like to try them at 18psi on the Cobra and would like some input if that tire will work at that tire pressure.By the way i found a place that has in stock the BFG Drag Radials 275 40 17 if any one is interested because most distributors are sold out of them and on backorder for a few weeks!