Easiest way to change rear bumpstop

Title says it all. I’m swapping my rear factory bumpstops to wheelers superbumps (without the u-bolt flip kit). Whats the easiest way to put them on, can I put jackstands under the rear axle and loosen the U-bolts enough to slide the factorys out and the wheelers in? I always try to avoid bringing it to a shop if possible.

 

Don't start unless you have new ubolts. Return them if yours aren't seized.

Ubolts can rust badly in 2 years, let alone 6.

As long as the axle is supported you can undo the ubolt. It's just a danger if the axle is hanging and the ubolts break while unfastening.

I would suggest loosening them off on the ground, so you can use a big ass breaker bar and there's 0% risk of any danger.

 

Good advice, they look pretty clean but I wouldn't be surprised if theyre seized. I’ll hit them with PB blaster all week.