I remember seeing a link somewhere on here, or not on here, to a website that has a How To on cleaning/refurbishing the Hydrolic Lifters.
I just went through an assload of work on my damn car and the lifters are ticking like mad! Im not sure if its an oil pick up issue, i had a lot out of the car; both pans, timing case, cams. Went to replace a leaky inputshaft seal and had to wait on parts so i took the time to address other leaks, which turned into a great time!