#1
so i want to mod my new squier strat's pickups,i mostly play punk rock, grunge, thrash metal etc. and there's the occasional clean toned intros to nirvana songs and acoustic songs and whatnot, so basically my question is, would a seymour duncan invader pickup placed in the bridge and a liquifire pickup placed in the neck suit this ?

Keep Rockin' \m/
#2
Subjective to your tastes. Whatever floats your boat.

Though it will work, you will need to toy with wiring because they are not the same.
Gear:
ESP LTD MH-1000
ESP EDWARDS LP-92CD
Shchecter ATX Blackjack
Fender Deluxe Stratocaster (H-S-S)