Alright doug, you are going to have to save me an orange one when they are ready.
I believe many people have been running 3.0 pulley's with no problem, and to a lesser extent 2.8 pulley's. Anything bigger than 3.0 should be perfectly fine, and the 2.9 should be fine as well. The 2.7 may require some larger injectors, I am not aware of how people have been doing with pulley's smaller than 2.8. Regardless, I would dyno and check the A/F ratio just to be sure.