About 5 it stopped raining so I drained the HFCM and I got enough water to cover the bottom of a thimble so that parts good. I also got the topside filter changed. Now I just need to change the lower filter but since I JUST filled the truck this morning, I think I'm ok until next Sunday and I'll get the lower filter changed once the truck is almost empty.
She fired right up with no problems so I think I'm good.
Thanks for the advice!
Joe