Quick update:
Checked the valves per steve's method, they looked good. Reinstalled the head.
Called Butler, they suggested the Hylift Johnson lifters. They advised I would probably need new pushrods based on the shorter seat height.
Installed new lifters, used Chuckie's video to measure for pushrod length. The length turned out to be the same as what I have. I measured several times to be sure. Comparing the pushrod installed in each lifter side by side, the Lunatis are taller by about .38".
To be sure, I marked the top of the valve with a sharpie, installed the old pushrod on the new lifter, adjusted to 1/4 turn preload, and turned the engine over a few times. The witness mark on the top of the valve looks just like the pictures I see in the how-to guides.
I think I'll put it back together this weekend and see how it runs.
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