Mine are set at 10"L/10.5"R, measured at the center, car's happy with that. Car likes to hike its LF a bit more than the RF; probably under-caged, but it's a vintage car so I'm not changing that. Modified SS springs, footbrake, 5800stall. No snubber. 13x31s, usually @ 7.5PSI cold. It'll carry the front tires out a good way, as much as 100 feet, on a good track, sits down very politely. Just knocks the shoe polish off about 15% or so of the bar's wheels. Goes straight as a string. 368" SB Duster/904/5.38 Dana, about 3000lbs, my weight about 160. 100lbs ballast. Low 10s with a 750 carb, should go 10.0 with the 1050. (If that info helps.)