Can't belive I just read all them posts. I would like to add some info but this thread is far two technical for me.
A hydraulic lifter whether in small or big block chevy adjusts the same. zero plus ½ to 1 turn. Anywhere close will work but may not perform as it could.
Now I think the pushrods are too long causing the plunger to bottom out siezing the springs. :lol: