im new to this forum, so go easy on me

i've got a Fender CIJ Jazzmaster that kinda bores me by now.. the pickups are waaay too trebly and the hardware is too unstable.
so i was thinking about modding the shit out of it.
i was thinking of changing:
pickups - p90s or similar
bridge - im thinking warmoth's custom Mustang-bridge
vibrato - not sure about this, but i've lost the original tremolo-bar for the jazzmaster, wich means i cannot use it properly. i can't use a allparts-one and i can't find another fender-bar that fits. so i thought about a bigsby?
colours could be chanded, but i dunno. its vintage white right now and i kinda like it that way.
also, when i have the money for it, i was thinking of giving it a firebird-style neck and headstock!
what do you think? any ups n downs?
any suggestions on what parts to use? etc. etc.