I had put my RPM heads on about 2-3 weeks ago. I come to find out many of my lifters needed to be pumped up, while I had the valley pan out I had taken them apart, pumped em up with oil and popped em back in again. I had finished putting it together and a ticking noise was still there. I took it out for a spin hoping the lifter would pump up with the oil nice and hot, nothing...stick ticks. I took it out for a 3 hour drive....still ticks. Something is up with that lifter on the #6 Intake.

Can I replace the one lifter? Do I have to buy a new set? Do I have to get the same exact lifter because I don't remember which manufacturer they were. I know its 1.90" tall and it has the oiling ring about 1/4" all around where the oiling orifice is.

Will a Summit special work if its the same height?