Haven't done myself, but had it done on several Mopars (A & C body). A good auto machine shop can change your LCA bushing for ~$20 labor ea. Once a local auto parts w/ shop declined because they said they had messed up too many control arms by pressing. I expect you need to support it correctly.
I have seen at least one kit with a threaded rod and cylinders that can be used to remove and install the bushings, similar to yooper182's design, but no welding just wrenching. I recall the cost was ~$50.
I recently got the 12-ton Harbor Freight press, so next time will try myself. Paid $90 (sale, plus -25% coupon). They have a cheaper A-frame model but too small for most jobs. Already used my press to assemble clutch packs in an A604 transmission. I need to find some arbor adapters for the press.
Re polyurethane bushings, read first. People have expressed concern that the LCA could slide back on the bushing (push out wire retainer in cross-arm). Haven't read of any actual problem, but study it.
If you also do your UCA's, the bushings are similar. But don't let a clueless machinist press the upper ball joints out. They are threaded in. I bought the special square socket to install, after I removed with a big pipe wrench (scratched some paint). There is a small and large size ball joint - pre and post ~1973 I recall.
MoparMarcus, you might want to revise your sig. Urkel's chart is up >20% since July.
