I'm not sure what your mods are? at one time I was allmotor (d16y8) I had a stage 2 cam w/cam gear, vtec controller and a chipped ecu. With that I notice a big diff. When you adj. that cam gear remember that you will lose top or bottom end. depending what u want. yes! the dizzy you'll have to play with alittle! As far as the timing belt dunno??
Dyno is the only way to adjust a cam gear properly, You can do it by the seat of your pants but the hp-tq gain/ loss probbaly wont be great enought for you to feel. Get car on dyno and play with timing and gear. Usually start by advancing 2 degrees and then retarding 2 degrees and see where your gain or loss is. Good luck