is it worth the effort? (cam)

You're already in the 12s, how much faster are you trying to go? IMO at this point any really worthwhile upgrades are gonna be big stuff, getting more power out of that setup N/A will take aftermarket pistons with more compression and proper valve reliefs and some port work to those EQ heads, IF you want to step it up to the next level; things like 1.7 rockers or a slightly bigger cam will give you probably 10-20 extra HP and barely any difference in the 1/4.