What do you mean with shrill? Is your guitar veneer board? The 63' set is made for veneer board necks... anyways
I had the IT neck in a maple/alder strat, and it worked very fine. The IT is twangy and cleans up nicely too. I beleave it's less dark than the Slowhand, but it's not on the very bright side. I'd say it's a warm pup, full sound, focused mids and a softer high end, good for bright guitars. The low end isn't icey picky dry as a texas though... A nice versatile all arround single coil, with a modern attitude, but it can still twang.