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Message: <blockquote data-quote="swampratt" data-source="post: 3194780" data-attributes="member: 15054">Yes that 300 six worked very well but MPG really sucked 15 unloaded and 10 working it hard is what I remember getting.Dad had a 1 ton Van with the 300 six in it with a standard transmission and 4.56 gears that one got 10 MPG no matter what.65 bags of sack crete at 80lb per bag in it and I measured the bumper height off the ground before we unloaded it and after.Only 2.5" of difference.Ford was not messing around when they built that Van.Uncle put together a Ford truck that was a long bed 4 door from the 70's and installed a 1967 383 chrysler engine and 727 transmission.That 1967 was the year for the last high compression 383.It got 18 MPG  even pulling a trailer as it really did not care what you had behind it.I called BS  on him and borrowed it for a couple days and went to fetch a Dodge Van that had a rearend I could put in my busted 1972 Ford 3/4 ton.Sure enough that 4 door Chrysler powered Ford truck got 18 MPG with the carter AFB carb purring right along.</blockquote>