[40coe]

When I rebuilt my engines, I had some great mentors to offer advice. One good idea is to drill a hole in the lifter bores. Drill the hole low in the valley area on each lifter bore. I think about 3/32" would be good. This allows for you to lock the lifter with a small Allen wrench while you adjust the screw for your lash.
I also took a quality 7/16" wrench and narrowed the width to the height of the screw. This made adjusting the valves really easy.