Need cam guru thoughts/advice

In addition to above, drag engines aren’t typically run at real high temps anyway.
If you’re not very quick at it, warm the engine to an easily achievable temp, like 130-140…….and just do one side.
Warm it back up if necessary, do the other side.

For a fresh build “first start” cold setting, I’d just put them at .020”.
When discussing this Comp Cam with the previous owner of the car ( he and his wife ran it for 16 years so he knows it like the back of his hand) he recommended cold lash setting of .019 intake and .021 exhaust. I'll try this for a couple of runs this weekend and depending on results may reset them to your .020 suggestion.