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B & B Military Surplus at Altona, NY there near where you live has supplied me with parts for my M54A1 for a long time. I purchased two Military water pumps and two Mack radiators from him as they are the two most difficult items to find for the ENDT-673.

This is my last contribution as to why I prefer the Mack ENDT-673 5-ton over the Cummins NHC 250. I have a 40-mile course over which I like to run a truck through its paces. It starts at Massie’s Corner at the intersection of US 522 and US211, runs through Sperryville on 211 up and over...

:jumpin:OMG...That is one sweet looking B Model Mack. I just love those old 50s and 60s Macks!:-D

Ah, The Radiator issue. Many of the military Macks on the road today do not have the original Mack radiator. They have the radiator used on the multi-fuel engines; the difference being the inlet and outlet hoses on the multi-fuel engine radiators must be reversed to accommodate the Mack engine...

There are three military versions of the Mack ENDT-673 engine each one progressively better in performance. The last version was usually coupled with the Spicer 5-speed overdrive transmission for best performance. The parts are not difficult to locate except for the unique water pump used by the...