How tight to set solid lifters

66Sat,
Are your tappet adjusters the original friction-thread design [ no lock nut ]? if so they might have loosened up from too many adjustments over the years. If so, remove & clean threads with Lacquer Thinner. Apply hi strength Loctite to the threads & adjust. They will stay tight.
Repeat process each time you adjust the valves.
Yes as per post #13.
I used blue loctite on the loose one. I just finished re-checking the cold setting. They are still at .016" and the loose one has stayed at .016" which is good.
I'm not looking forward to checking the hot measurement at all. Apart from the heat issue, if they have loosened further and the advice I followed is backward, then I'll have to do them all again...
Fingers crossed 66fs is right and Newbomb Turk is wrong (no offence of course, it will just save me an hour or so).