Re: AlNiCo 2 or 3 in my humbuckers????
I just plopped some A3 in some neck pickups tonight. One was a Sethn, and the other was a Jazzn. One of my current guitars has a Custom Custom bridge with the A2 swapped for an A3.
From my experience, the A3 sounds a lot like an A2, but with slightly less mids, slightly more highs, slightly more bass, and slightly less output overall. The biggest difference seems to occur in bridge pickups. I've swapped the A2 in a PGn for an A3, and the difference was barely noticeable. Tonight, I swapped the A2 in a Sethn, and the result is very similar to a SethN, but with just a hair more highs and lows. The JazzN was an A5 to begin with -- swapping in the A3 made it sounds *a lot* like a A2pro.
Getting back on the subject: why not have him install A2s and throw in some spare A3 magnets? If you don't mind swapping magnets and experimenting, it might be a good choice.