Topdog's method does not work with a heavy duty spring. It is marginal and extremely dangerous even with a standard spring. It only works safely with a cut down or lowering spring - but only if the spring is short enough. PLEASE don't take the safety risk!
Also if you make or use the home made spring compressor - never ever let the all thread touch the frame or get loaded in bending. The load on it must always be pure tension. The all thread will fail if side loaded or bent. Use the procedure in the shop manual. You can't just swing the lower control arm on it's shaft - you must remove the inner shaft bolts as well as the ball joint. A coil spring unleashed can kill or maim you, take it seriously.
usually the auto part stores have loner tools..
like spring compressor bearing pullers etc...
they usually just hold a deposit on your credit card
and refund the money back when tool get returned back....
I have one of those tools almost exactly like the one that Pops gave the link for. I live only a couple hundred miles south of you in between Sac and SF. I'd be willing to let you borrow it if you'd be willing to pay for shipping back and forth. Just lemme know, and be patient a little bit because I work all week, and shipment would have to be on my time off.
It looks just like Pops example. Sorry I can't post a pic, because I still haven't figured out how to load pics onto my laptop. Just like this one from Pops link though, and a pretty neat tool,
Rebuilt my front suspension last winter and agree with the majority responses - either buy or make the tool. It's the only safe way to do the job. You'll appreciate it most on the reassembly when you see how compressed the spring needs to be to get the ball joints into the knuckle. Take your time and no shortcuts - you want north/south tension on the rod, no lateral. It's not hard, but don't sacrifice safety.
Gary, I think those coil spring compressors you showed in your first post are for use with strut type coil springs (late model stuff). Outside of the coils. You definitely need one that goes through the center.