Swap suspension 2015 to 2005

I am installing new suspension components (shocks/coils/leafs) on my 2015 4x4 (V-6) ~ 50k miles.

A buddy of mine has a 2005 2wd (4cyl) Tacoma with 120k miles, and it sits rather low to the ground/has some sag in the rear.

We were debating throwing my stock suspension components in his truck.

My questions are:

1) Are those suspension components compatible between late and early 2nd Gens

2) Would it be worth it? My stock suspension does not have much wear or leaf sag.

 

If the 4 cyl is a 5 lug it will not fit. If the 4 cyl is a 6 lug then it should swap over. This really all depends on what suspension setup is already on the 4 cyl. There are some article about 5 lug and 6 lug suspension being different. That might be a good place to start.