The hot water exits the intake and flows through the heater core and on to the INLET side of the waterpump.
The port the heater returns to is in a common area to the big hose barb on the pump that connects to the lower radiator hose.
Hot water exits upwards from the front of the heads, into the intake manifold, flows though an area in the intake manifold that heats the fuel mixture, then exits upwards at the back of the intake through the clever pot metal quick connector into the heater hose.
Have you checked the quick connector? There's a rubber washer flow restrictor in the connector that can clog or get deformed/crushed nearly closed when the pot metal fitting corrodes and deforms.
Older engines with "V" belts used CW waterpumps, serpentine systems the drive the pump off of the flat back of the belt run CCW.
The vanes on the impellers have the opposite slant between the two pump rotations.
If you got the correct part number for the year/model it SHOULD be correct!
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Today's Featured Article - The 8N and the Fox - by Zane Sherman. Dec. 13 1998, Renfroe, Alabama. Last niht I dreamed about the day that I plowed the field of about 10 acres over on what Jimmy and Dandy called the Ledbetter field. I was driving the 1948 8N Ford tractor that Jimmy bought in 48 new This was prebably in about 1951 and maybe even befor the house was built. This would have made me to be about16 years old and I drove the tractor for nothing and would have paid to drive it if I had had any money which I didn't, but neit
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