Not wishing to stray too far from the original topic; however the questions were raised about carb to EFI difference, and adapting the late Ford 300 EFI:

Dad bought Ford's for 70 years; starting with a 1912. His late 300 van with EFI was horrible. At the same time I had the identical van, granted that mine was a stick transmission, and his was an automatic that was a couple of years older, and carbureted.

The EFI made much less power from a LOT more fuel, and I think every electronic device in the EFI failed at least once. He replaced the fuel pump relay 7 times in less than 50k miles. The carbureted version would get 35~40 percent better fuel economy when we traveled in tandem.

I would rather have a Rochester B wink

EDIT: In all fairness, this is my ONLY experience with one of these; it is quite possible this example was merely a production lemon, and not representative of the entire run.

Jon

Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify.
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