I have Global West upper control arms on a modified 85 El Camino frame. They cost over $500 but, allowed me to use full size 1985 Buick spindles & brakes.
This would appear to be an expensive method of solving your problem. Remember the farther out you place your wheels the more mech advantage you have & the heavier (lb/in)spring you need to keep the spring rate the same.
On my car it increased the track very little.

I would use my original frame & modify it or if you have no frame buy a frame that has the correct track. If the latter is the case tell us what track & wheelbase you are trying to achieve & will try to help. I bought my frame for $200 from a salvage yard........Don