Dumb question, cold starting...?

This might be obvious or not a big deal but I was surprised to not find anything relating to this using the search tool. I built my first "block-up" 360 with bearing clearances on the loose side and a normal-volume oil pump. Is it better if I crank it for a few seconds before pumping the gas to get it fired in order to get the oil flowing a bit, or should I just pump the gas beforehand and let it fire off with the first crank? I notice it usually takes a second or two for my oil pressure to come up after it starts and there is a bit of a lifter tick during that short time, just wondering if this is something to be concerned about at all or if it will wear the bearings more.