I would go ahead and replace the spring eye bolts, and would also swap in a new set of bushings as well.
Might as well go ahead and do the SYE and 8.8 while you're there, but not until after you get the new springs in place. The springs give you a little more room to pull the transfer case, and you can go ahead and set your pinion angle on the 8.8 once the SYE is in place. I know a lot of people replace the u-bolts, but I've had no issues reusing the factory 8.8 bolts on the few I've done.
I did all of mine at the same time, the lift, SYE, and 8.8 install. Just make sure the transfer case is bolted in with the skid plate and make sure the rear springs are under a load before you set your pinion angle and measure for your DC driveshaft.