Lifter preload...more or less?

Make sure the stamped rocker arms are not banging on the retainers! This is a common problem when upgrading the springs.
IMO, with stock stamped rockers Your preload should be about .020. Too much less and you will be going back in, in a few weeks as things move around.
More will work, but the risk is valve to piston contact, as the springs lose control with rpm. I highly recommend adjustable rocker arms.

Post #3 for the win.

CFD244 said

quoting Bewy
"The reason for such a short pre-load of say 010 is in case the hyd lifters pump up at high rpm. If the preload was, say, 080, that would mean the valve can theoretically increase max lift by 0.120" with 1.5 rockers.....& the valve could hit the piston.

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