Yes, they are still out there NUMBER 2

[Bruce in southern OH]

Ok, engine block would hold about 2 gallon, I read you take baking soda and water and rinse to stop vinegar reaction??? Any way the vinegar would be to strong on old cast steel block for a week? Don P. one time cleaned a lot of old casting sand out of a V8 motor, cooled it down. I really think the pumps will improve the idle/parade temperature problem. Will try your suggestion if you don't see any damage happening. thanks Bruce