The water pump that comes on a factory Vortec engine does not have the bypass hole. Also the bypass hole does not exist in a Vortec head. I don't know what the block has or hasn't but it doesn't matter.
It matters to me because I am using a Vortec shortblock in an earlier application.
I had three holes in my intake. Originally I used them for heater, stock temp sender and auxiliary temp sender until I realized I needed a bypass hose. So I added a tee in one hole for the bypass hose and one temp sender. I saw Acardon did something like that on his engine. If it doesn't work well I can always move the temp sender to the head. Anyway I now have a bypass hose thanks to everyone on this site. All I need is a hose to the heater and a return hose to the lower radiator hose.
Thanks everyone for showing me how it is done.