I think it was actually the F700 and larger that used the Lincoln block. Definitely not the F350. But who knows what was installed in the last 55 years.

Kenneth

Fredricksburg, Texas

53 trucks F-600 and larger came with Lincoln based 259 or 317 engines. Light trucks used the flathead or the six... I think LOL

I recently purchased a 1953 F350 Tow truck.  It has a "Y" block in it.  I have no idea what size it is or if the truck originally had a flathead and this engine was installed later.   The guy I bought it from said hat he was told that some 53 commercial trucks actually came with a "Y" block.  The VIN in this says it should have a flathead.  Any body have any ideas how I can find out what my engine is?  Thanks 

Tim

Tim