Robert,
Yes, I replaced the carter that was on it with this simple little 1920. Then added a nos vacuum advance distributor.
The carter ran terribly but got 14 mpg. When I put the holley on, it ran great and had a lot more power. But much worse mpg. This is when I started going over everything. The truck is running excellent now, but mpg is yet to be determined. If this doesn't help as much as I would like, I still plan to swap an 8 3/4 with taller gears. Thanks for all the input.
And of course change the jet.