Generation IV Internal Engine - tick tick tick tick ? wtf ?

so iv had my car for a few days and when i start it and get close to the engine i hear a tiny ticking noise, it ticks faster when i rev it..when i get in the car and put it in drive thats when i hear it the most ! it would be greatly appriciated if i could get some imput on this. its really bugging me. the oil pressure never drops under 45 even when its warm. please help !

What block n lifters and Cam? and what other mods you have ?

stock everything. i just had some F body guys over and all of them said it was normal...every one of theirs does the same thing only louder so im deffinetly not worried about it at all.