Congrats on the ownership!! If you don't drive it much, you can probably skate by till Dec. But a bad radius arm bushing will play hell on other bushings and components. I know O'reily's has a cheap set for like $20. I tried these and split one within a few weeks. Went back and got moogs, have wheeled the crap out of it and they're still good. I would replace them now, as long as you're going with a regular lift kit that will include radius arm drop brackets. You'll still be able to use them. If you're going with long arms, (highly reccomend if you can afford them, or can fabricate them) that's a little different story. But our passenger side was so bad for so long the radius arm had worn a slot into the bracket and we had to replace it. That also put undue stress on the axle pivot bushing, something else that yet needs to be replaced.
Just my 2 pennies, and the way my mind works....... can't wait to see what you go with.