93 LX FiveO

my car makes a clicking noise if i just start it up and drive off. only under load and the noise isnt really that loud.. i have to roll the windows down to hear it. im thinking a valve needs adjustment or a lifter is sticking.. something along those lines.

after about 15 minutes of driving i can lay on it and there is no noise at all. if i put it in neutral and hit the gas it dosnt do it? like i said only under load, and only in the morning

any input appreciated thanks