You now have water and grit in the pan and along the pushrods and oil drain holes that go through the head. I would drop the pan and clean it. While the pan is off I would flush the rocker arms with diesel oil or other non-water solvent and catch the drippings in a pan below.

I am hoping someone has a better idea to get you out of this fix. You don't want to circulate that gunk through your oil system and bearings.

Kent

1937 Chevy 1/2 ton
1942 Chevy 1/2 ton
1947 Diamond T Model 509
1951 Chevy 1/2 ton
1950 Chevy COE Model 5700 ~ "Barney" ~ And more pix