Adjustable lifters.

GB SISSON said:
Has merit, but I still contend that poking that allen wrench into a drilled lifter bore and cranking down hard on either my suggested lock nut or big duece's shimmed adjuster bolt is the tried and true method that all major auto makers worldwide have used for secure valve adjustments. Anyone know of a mass produced auto/truck/industrial engine that came from the factory with a necked down bolt with interference fit holding their lash secure?
I did a bit of measuring from 4 samples from a coffee can of used non adjustable lifters and they averaged 1.45". With an original Johnson cranked out to that height there was .138" under the head (photo). That would be a lot of shims. Would be best to top a few Mcmaster-Carr shims with a hardened steel washer. But we are adding weight here.
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You could possibly do it in 3 shims. .125, .010, and possibly a .003 or what ever is needed to establish your desired lash.
 
I had not looked at the link you posted, jut the three sizes you listed in post 22. The .125 is a game changer for your method.
 
The first flathead valve job I used a can opener knife sharpener to face the valves,used a block of wood with a V to guide the stem on the grinder to adjust clearance.
 
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