Rear intake coolant bypass

Good point on the head feeds but the main one is in the back.

No, coolant pressure is not uniform throughout. It is lowest just before the pump and highest just before the t'stat and in the heads. It is a difference of several psi. That is why guys who remove the t'stat and fail to put in a restrictor in its place often see temps rise, not fall. The t'stat is a restriction that creates the higher pressure in the heads; when that restriction is removed, the pressure in the heads drops and the coolant in contact with the hot head chambers boils more readily and things eventually get hotter.

Ain't trying to make this look bad.... just pointing out what is going on and is possible and how the standard flow is being changed. If you are not seeing any temp changes one vs the other, then that is a good sign. IMHO, never hurts to discuss these matters; we all learn. Tnx.