202k rebuild

[VICSVX]

some know that i am in the process of rebuilding/doing a tune-up on my engine when i do an AWD trans swap.

questions being:

what should i replace on the engine for long term while the engine is out besides the seals/gaskets? ive read and searched many forums and each suggest different parts ie rods, bearings ect...
i would really like to know the things i NEED to replace while engine is out and torn apart

second, when taking the AWD TCU out, which one is the TCU (if i remember right, one is white and other is black?)

thanks in advance guys...and gals