Heavy truck engines

In the sixties, we had T-750's with 332 engines and T-850's with 534engines.
Either Clark, Spicer or Fuller 5 speeds with Spicer 4 way aux trans. Fuller's were not syncronized and were dogs to shift. The Spicer 5 speed was a dream to shift.
 
Anybody know what the two tanks right behind the main tanks are for? On the truck being towed.
I've been driving a trailer truck since '83, I never got to try a "two sticker". Now there all automatics. Select "D", step on throttle and just sit there with your face hanging out...Mark

I think they are sanders for traction in slippery conditions.

Bob
 
I am not sure about the answer to the original question? There is evidence the 4" Merc-type engine was put in trucks. Just take a look at the old TRW, Federal-Mogul, and various gasket manufacturers catalogs. In my personal "eyes on" experience I purchased a Flathead from a fire truck which has a 4 " crank. So, I would say it is possible.
 
This has been discussed extensively on the Ford Trucks site and the only trucks with the 255 as a factory regular production option were 1952 Canadian Mercury M-5 and M-6 conventional and COE's. Apparently fitted there as Canadian production of the new OHV V8's lagged a year behind US production. US trucks never had it as a factory RPO but on a big truck cab-and-chassis like for a fire truck, it's possible something could be worked out to get a 255. Could have been a dealer swap too.
 

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