Bottoming out the plungers is how I adjust all hydraulic cams on engines here. Some lifters will take a couple of minutes to "bleed down" so don't be in a big hurry as you tighten the rockers down to push the oil out and the plungers to the bottom of the lifter bodies.
It's much easier to do this during the rebuild before the lifters pump-up with oil.
If you are adjusting an engine that's already been in service you may end up waiting 120 seconds or even longer as you adjust the rocker arms down. It's not fussy, and for sure you'll know when you have them fully bottomed out as things get really tight and the valves will start to open if you go any further. The KEY to success here is to make sure you are doing the adjustments with the lifters on the base circle of the camshaft.
This method for sure will quiet things down vs adjusting down from zero lash.
In theory it shouldn't matter as lifter leak down rates should be slow and consistent for all sixteen lifters. However, poor machining tolerances have left us with parts that aren't so great these days. With plunger to lifter body tolerances all over the map endind up with a noisy valve train happens is pretty common. In most cases it's more annoying than anything else and really not hurting anything.
Even so allowing less room for plunger travel also allows less leak down distance and in most cases will quiet thing up some.......
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73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile),
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