Robert Bendtsen

The numbers were right where you said they would be. Thanks. It is an EN510. After that there is a 8-44. Is that the manufacturing date? During WW11? That must be a special run for a firetruck. Bob

I am the proud owner of a cool looking Mack Thermodyne inline gasoline 6 cylinder engine. There is no data plate. There is a brass plate on the valve cover that says "Thermodyne". There is also a large "MACK" cast into the driver side of the block. Casting numbers on the block are 239C8544 or possibly 239CB544. There are stamped numbers 732GBA2288E. These numbers are also cast into the block 3 7 3 4. It has an updraft Stromberg carb. Any help out there? Bob Bendtsen bbendtsen@aol.com www.transmissionadapters.com