I second Oppositeboy's recommendation of the OME 880's. The 881's might work with your 3" spacer, but it would likely be too much lift. That combo would give you probably around 4", at least right at first, which would not be good, because you would have zero downtravel and it'd wreak havoc on other suspension components (the 881's by themselves provide 1-1.5" of lift, if I remember correctly). The 882's combined with the 3" spacer would not work. Far too much lift for your stock suspension.tacoma98 said:
I would also stay away from the TRD springs for use with a spacer. Being that the TRD coils are progressive rate, the first few winds of coil are much softer than the rest. Adding a 3" spacer tends to push those first few coils together, which can result in an even harsher ride than usual. Because of that, the non-TRD coils are generally recommended as superior to the TRD's for use with larger (2"+) spacers. From what I've read, the non-TRD coils + spacer combos simply ride and perform better than the TRD coils + spacer setups. You'll find a few people that disagree, but I think it's safe to say that's the general concensus.
Again, I'd suggest talking with Barb at trdparts4u.com about either the OME 880's or the non-TRD coils. Great customer service and they often have among the best prices around.
Also, definitely search for more threads related to this topic. There's plenty of them on here, and they'll give you a better idea of people's experiences with Cornfed/coil combinations.