Tire diameter is 27'' and the T-bars measure a touch larger than 7/8''. (Factory 318 car)
I can change the tires because I just ordered a set of Coys C-5 wheels in 20"x10"
and 18"x8"

I heard that the factory LCA rubber bumper was designed to hit and then compress, which gives the LCA a little more travel room.

I saw the Hotchkis tubular upper arms... almost $800.00. (I'll pass on those) It looks like the little extra bracket that they have puts their arms on the same travel plane as the factor lower arms.

So... I don't need drop spindles, or tubular upper control arms. That saves me a lot of money. I guess I should consider a set of MOOG offset bushings, and maybe a pair of PST tie rod sleeves, and thicker T-bars. Ohhh, and front and rear sway bars!