340 break in question

Not for the first start. By the time it reaches temperature the lifters and lobes know each other too well, and there’s been little splash up onto them while they were getting to know each other.
Pre-oil, verify spark without turning the engine over, and manually fill the carb bowls. Eyeball about 20* of initial, and fire it going right past 2k.
While you are correct some wear cannot be avoided in any cold start, the first start is to initiate proper wear patterns. As long as you’ve done the above, wear will be minimal during first start.