did the engine tick before you did the job?
it's not piston slap is it?
did you install all the lifters in the same location? (although this shouldn't matter, i've done it countless times with no ill effect)
I would run it a little bit more, when the engine has been apart the lifters can take awhile to fully pump up and prime.
baring that i would try some oil changes and maybe even some additives like MMO or seafoam in the oil.
on older EA engines with HLA's that were prone to ticking, if it can be pointed down to one HLA sticking (rather than all of them being noisy due to oil supply) - it was fairly common to run a quart or two of ATF in place of oil to help clean them out. not saying i recommend it but i would entertain that verses pulling the engine back apart if it came to it. hopefully the first few suggestions take care of it for you.
on older 1980s' HLA equipped engines like this the ticking, while annoying, doesn't matter and the car can be driven 100,000 miles like that. so you got time and I don't believe...although i have every limited experience with EJ ticking valves since it doesn't happen much (older EA engines are *very* prone to this)...it is an emergency by any stretch of the imagination.