It all depends.

3.4" would be simple...doesn't mean the car will run it knock free either.

Same with the GenV...and you could be on a stock pulley.

I'd get a way to scan it before anything. I'd do the modular system, toss the pulley on the GenIII...and enjoy it for awhile. You're not anywhere near maxing out the GenIII.

I'd port the GenIII while it was off too, at least the outlet.