Just one more data point on the 261 that often gets overlooked .... The early 261's (the ones built for the 1954 and 1955.1 Advance Design big trucks) also have the high water pump mounting. More info can be found in the 261 Rebuilding Tech Tip.

But the thing to remember is that there were 261s made during those model years to fit those trucks, as well as 261s made *after* those years (as crate /replacement engines), too. I have one smile

So when you find a 261, be sure to check the casting numbers carefully. As you will read in the tech tip, it makes a *real* difference -- not just because of the water pump ... You might get lucky like me and find a 261 that requires *zero* mods to install in your AD truck. Um ... but if you want to stay 6 volts, you'll have to ... read the tech tip ... wink

Ed .... I want to be Jerry when I grow up. wink

~ John

A kid raised on Hotwheels, Matchbox and Tonka cannot be reasonably expected to own only one vehicle as an adult.

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