First....thanks for all the replies. I will try to answer all the related questions: the pump is a new CSR...on the old motor, I used an Edelbrock mechanical water pump....this may be a factor. This is a completely different engine...BFM heads....new Dart little M block....2 piece intake....alum. 3" radiator w/ overflow tank....the wiring to the pump may be reversed....never thought of that. I've had a few cooling fans run the wrong direction, though. The timing is exactly where it was, when dyno'd....which is not to say that it is exactly where it should be, due to the factors changing.......it was set at 35 degrees, but will probably be increased to 37 -38 for the next test / tune. I'm running 114+ gasoline......the water temp. was about 180 at the line. No other changes to the body of the car....it has open fenders / no inner fenders. I know this engine will run hotter than the other one, just due to c.r.....but is 195 - 200 too hot, if I can get it to stay in that area? Thanks again. Dave.