I just reviewed a great video on YouTube, link below. At 15:10 you can see he places a gasket before the pump goes in, really important! Well I did purchase this gasket and install it. However, my dumb a$$ put it in between the two parts of the pump housing. Problem solved, well after a day of ball busting work I still have to do... Need to still check to be 100% sure but no gasket goes between the two pump halves??

https://www.youtube.com/watch?v=H9wknedhRFQ