I've got a torn bushing boot on a rear upper a-arm I have an arm with a good bushing I can swap it out with b4 I hit the track

I don't want to do it right now if I'm gonna have to get an alignment it doesn't look like it'd affect alignment?

 

You mean the ball-joint boot?
With the wire-circlip?
As long as the ball joint is straight alignment would be the same.
If the ball joint is bend without you knowing it, it may change alignment.



edit: I would just swap the boot, not the whole arm IF that is what you mean.

 

There is a bit of play on the two bolts but I think it might be very minor. I've removed the upper arms and put them back on before with no real difference in alignment specs.