Boost bottle's are crap, that's just a running joke here. As for staying in the 350 class if you wanna go all out in that class I'd think a 65mm cub with all out drag porting would be sweet, lockout, override, +6 swinger, wheelie bar, 39pwk's on alky, vf3 reeds, adjustable timing plate, Small bore out of frame Shearer pipes.
There's you a good starting list.