Brad,
Ummm. hate to ask but, why did you replace your heater core? Was it leaking? My heater doesn't work, so no need for my heater core, but I just know that sucker is probably 40 years old, so I dread the smell of sugar in my passenger's side seat.
Yep it leaked... I had everything all finished, washed it for the first time ever and was taking it to it's first cruise night and it started pouring out on my newly installed carpet!
I sarcastically thought to myself "Oh ya right, sure! ...a part I hadn't replaced yet.."
So I just looped the heater hoses and went to the cruise night anyhow!
Not that I need a heater at the moment or anything, but the new core was staring at me asking to be installed.