X2! The OME 880's will only give roughly an inch lift over stock OE coils, and that's pushing it. You may want to rephrase your sales pitch to say something to the effect that you will NOT need the longer struts with these coils. The stock TRD Bilsteins will work just fine with the 880's.the coils will be a direct swap for OE coils in '95-04 Tacos
you'll gain about .5" in the average v6 and about an inch with the 2.7.
OE TRD shocks will work fine. OE v6 shocks will work "ok" but not great.
forget trying to use OE 4-banger shocks...not nearly enough dampening power for the 500# OMEs compared to stock 420s.
ride will be a little stiffer but better, IMO, than stock
you can add spacers or trim packers for more lift up to about 1" thick (2" of lift).