I am running 37 pd injectors right now with a TA-49, ported and polished irons, 62 mm throttle body, 206 roller, 3inch down pipe, not sure if these are to small anyone?
60's seem to be a good choice. Idle is good almost like stock.
Keep in mind that most single intank fuel pumps can only supply enough fuel for 60lb/hr injectors. So if you don't ever plan on changing to a double fuel pump setup, or external setup, then there's really no reason to buy larger than 60's.