lifters

Hello everyone. I have some leftover unused new parts from my engine rebuild and am offering them to the budget minded re-builder. My engine kit came with these parts but I decided to use different parts. These are new in box, never installed, in original packaging. Cam even comes with assembly...

i have a ticking noise which I'm assuming is the lifters? what would be the steps in order to fix this? thanks!! 1968 cougar with a 289