Lifter noise
and the next engine you build, take the time with a die grinder and remove all casting flash. That is most likely why you can't get the lifter out. It helps with oil drain back too!
Desert Rat, call Clay Smith Cams and tell them what you have and he'll tell you what you need! Ask for George! 714-523-0530
These guys are the best! They will grind a cam just for you!
http://claysmithcams.com/