For the TT you will need more than a SYE. You will need a SYE and a CV shaft, at LEAST rear upper adj. CAs, and a BL/MML. Adding a lo profile transmission mount wouldn't hurt.
For the 35s, as long as the HP30 and 8.8 have matching gears you will be ok. Chromoly shafts are a nice upgrade. The HP30 is a direct swap as long as its off a Cherokee I think 89 or 90'+? And for the 8.8 I know there are modifications needed for the shocks, so that will need some work. Don't forget to upgrade your steering as well as your brakes.