How long to rebuild front suspension?

Go ahead and spray every single fastener you can see with GOOD penetrant oil right now, and every day until you start working.

I like the Mopar brand with moly in it.

You might even hit the nuts with a propane torch first, then spray 'em. Rinse/repeat.

If you're pulling the K frame (if the car is high mileage, I bet the LCA holes are toast), drill a 1/8" hole over the K frame bolts so that you can blast penetrant in there too.