Yeah, I was gonna say, you got a steel block, a 25.5 neck scale, the brightest strat single coils in probable existence, with a maple board and poplar body and you STILL think you have too much bass even with lowered pickups? Problem is not your guitar bro, it's the amp. Only other thing I could possibly suggest for the guitar is higher pot values but that will just add highs so the low end won't seem as prominent, and frankly with that amp up at appropriate levels I don't even think it will make a difference. Here are your options from my end of things.
1. Buy an EQ pedal and dial out the lower frequencies. You can even tweak the mids and highs around too. They are life savers with those little amps that give great tone but not a lot of range. Probably the cheapest and easiest way aside from Itsabass's but sucks to carry another pedal around.
2. If possible, have your amp modified for more EQ control than just 2 knobs, and take the power up a bit so has more headroom and volume available. This is more expensive than the pedal option but your amp has everything right in it already.
3. Buy a new amp all together with more flexible tone. Probably the most expensive option, especially if you don't wanna give up the one you're using.
Doing exactly what Itsabass said is going the cheapest and easiest way of going about this if you think the guitar is the issue and not the amp.
But honestly I wouldn't touch the guitar in this particular case. I'm just saying if you have an incredibly trebly guitar and still have too much bass then you gotta look elsewhere for the problem. It's not the best idea to go fixing things around the problem to make the problem acceptable when there are ways to just fix it.
