Tapping when cold and trouble shifting to first

[Praxiss454]

Hi All, Recently rebuilt my L6 230. Broke it in, and changed the oil. Running SAE30 this change with ZDDP additive.

When I first fire it up, its very tappy. I don't know if this is normal or a symptom of a misadjustment. I followed the compcams instructions to set pre load on the lifters, 3/4 turn past when the pushrod wont easily spin in my fingers.

Video of cold start: https://imgur.com/l6cKica
Video after it warms up: https://imgur.com/x6ZlTGi

Any thoughts?

My second problem is thus: It's the manual 3-speed transmission with 3OTT. Sometimes when I go to shift into 1st gear at a stop light or stop sign, it sort of jerks/thunks/grinds into gear even with the clutch pedal fully depressed. I believe this is a non-synchro transmission, but even from a dead stop this happens sometimes. What's going on? Any thoughts on how to fix it?

I've tried to double clutch, I've tried to goose the engine a touch before attempting, no dice. I don't think it's happened when switching from Reverse to 1st gear, only when downshifting from 2nd to 1st at a complete stop.