THX a lot, that page is really interesting, but now I'm conderned about something new. They say:

"... pumping up the lifters by hand before the engine is assembled to fill them with oil may make them seem like solids later..."

That's exactly the problem I'm having. I seem to have pumped the lifters too hard (when applying too much force in torqueing down the rockers), now some of them seem to be stuck and don't allow for preload. A lifter should be depressable by hand, shouldn't it? Can you disassemlbe and reassemble lifters yourself? Or should I get new ones? Or might that problem be solved when the lifters get pumped porperly a few times by the engine? The lifters have no foot wear, they're actually brand new.