did it have the cam broke in correct?

did it wipe a lobe?

were the lifters you changed still good on the cam side?

are they all spinning in the bores?

how big of a cam and spring is on it?

may just need run in some to get it fully pumped up

I cleaned and inspected the stock hydr roller lifters in mine,when I swapped to a roller cam

then installed them and they ran for 35 mins at idle before they quit making noise all the way.