Advice on lift

ok so i just recently bought a 97 tacoma 2wd and I plan to lift it I'm thinking 4" lift spindles in the front entirely new 4" leaf pack in the back(mainly because stock ones are sagging) but i have a few questions about doing this lift

1. when i lifted my old chevy s10 i didn't have this strut bar that i discovered my tacoma has. will a lift spindle put this strut bar at an odd angle and if so what are the effects of it going to be?

2. how often is it that a lift either causes death wobbles/road wandering or rear axle vibrations? i never had an issue with my s10 but then again it was only 3"

3. when i do this i am thinking about putting on 275/75/16 will this be too much strain on the 2.7? it currently has 3.58 gears in the rear diff i know i should go up to a 4.10 but how hard is it gonna be on the truck to be pushing those tires with 3.58 gears.

4. and lastly what is everyones input on shocks i know the 5100s are awesome but I'm not looking to spend that much on shocks