Routine maintenance questions.

I figured with all my bolt ons I got coming I'd do some normal maintenance as well wanted to ask about the dreaded spark plugs on these cars.

I'm approaching 100k on the motor not sure if the plugs we're ever changed when I bought it at 52k anyways wanted some recommendations on what plugs to use. I see a few posts about NGK's blowing out. That I don't need right now I also plan on spraying the motor this fall and at a loss on what plugs to run all together. Also do I need to replace the coil packs as well?

I'm also getting a little belt squeak in the mornings but once the car is warm its gone, is that normal or is there some other fixes I can try. Belt was changed about 1k miles ago.

Diffrential fluid has been changes as well as the radiator flush any other things that I might need to go ahead and replace on moderately high mileage? How well does the timing chains and stuff last on these cars?

Thanks for any input that can be provided on this.
 
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