Hi George I use a pump and a small tank about two quarts but I hardly ever use the pump . I think you should be just fine with water in the block . If you tow it back from a run I doubt you will ever have to drain it.
Hello Bill, I have lots of options to make coolant connections. How do you have yours setup. What is the tank height. I was thinking of tying the lowest point on the block into the tank ( both sides) and doing the same to the two highest points ( top of intake manifold , front , each side.