Gettn ready to the same swap my self. Go read!!!! Educate your self. Knowing what you are getting into is what will make it easy.
Spring pads have to be moved. If your good with a grinder and use a cutting disk you might be able to reuse the perches. Same goes for the shock mounts.
Kits for these parts are ~170$. You'll need a new spring plate as well. The 8.8 is 3.25" which is bigger. This also means you have to get new U-bolts for the larger axle. ( I Just got mine today! Last part I needed. So guess what I'm starting tonight?
) You will also need a yoke adapter~ $70. or if you get lucky you can get a U-joint adapter if you end up with the ford flange. One that has a 1310( wrangler standard) on one side and 1330 ( ford standard) on the other so you can still use the ford flange. It's a cheaper way to go if you can. OTOH on the trail 1310's might be a little easier to come by. So the 1310 flange adapter might be a better choice in the long run.
Then there's the parking brake cable. If they come with the 8.8 you'll have to adapt something for the cable ends to work with the jeep cable. There's a lot of ways to handle this and it will totally depend on what you get with your axle.
I got my axle for 175$ (4.10 limited slip!) However Junk yards are interesting places. Here's some questions to ask....
How much is the core charge?
Will they accept your D35 for the ford 8.8?
Can you get the flange? This part is some times considered part of the driveline.
Does it come with brakes >>> AND CALIPERS<<< Mine didn't. Calipers are ~$35 but they also have a $30 core charge.
Does it include the parking brake cable?
Any thing they say no to can become a point of negotiation.
Some places you can haggle others won't! But they typically will match prices so do call around!
I have spent 10's of hours researching this just to make sure it goes smoothly. Knowledge is your friend! Oh and one last suggestion Find some cheap rims to use to move the axle around on. This way you won't damage the brakes or the dust covers. Make sure you have a good set of jack stands to lift the back end high enough so you can move the axle out safely.