‘63 and ‘64 Dart motors

Not with block casting numbers. There are numbers stamped on the top of the block (deck surface) that sticks out past the head just below the number one spark plug hole. If the block has been decked the numbers will not be there.
The water pump bypass hose between the water pump and the head is about 3 inches long for the 198/225 engines. The hose on the 170 is about 1 1/2 to 2 inches long.