tubular lower control arms for coilovers

not an expert....I'm a hot-rodder like you.

just unbolt the front and watch it (go in and out) as the suspension goes up and down.

that movement has to be picked up somewhere and if the front and rear cannot move, the the LCA has to, presumed by me at the K-frame bushing. it is not a big movement but over time, who knows....I don't....... maybe it is a non-issue???

I'll run a square off the floor and butt it up to the spindle then run it up and down and see how much movement there is forward and back. Seems like if it were moving forward and back or push and pull on the strut rod you would be able to feel the binding in the action. I can move from bottom to top with one finger on the spindle and you never feel a bind or hard spot in the whole action. I'm not doubting you just stating what I've seen so far.