Maybe they should of just told you they would swap it out for you since it was a bad "new" lifter.
But id say 50/50 but if one tells you no, call back and get the other, you can count on two diff answers on everything from those 2 guys.
Well I initially thought it was trash in the lifter and now that I've drilled the rivets out holding the link bar on, well, who knows? But, at least I know it wasn't my fault and I have concrete evidence of what was wrong. You can bet I will be blowing air into the replacements before I reassemble it, I'm tired of buying intake gaskets.