K, I am getting a bit more detail now. Thanks to you both for your help. I have some decisions to make, and I am not sure what to do with the engine now.
For the record, the engine is a 2005. We do not get E85 here, as far as I am aware, at least. I was expecting to use 94 octane pump gasoline, or possibly that with additives, or maybe buying Sunoco race fuel by the barrel and blending with the 94 octane. I may just leave the engine on the shelf or possibly use it as a transporter engine. How are they NA for fuel consumption?
If I was going to spend the cash for the rotating assembly, because of availability only, I would go with one of my quad cam 4.6 modular V8's or big block 460 engines. With the 460, it does not require much more than a few hundred dollars to have effortless power that will virtually go forever. Ford made them for 30 years and I imagine they made more than one million of them. Parts are everywhere here. I have heard and read some saying they use lots of fuel, but I have found it to be very, very efficient compared to other petrol engines. Just have to gear the vehicle right. Let the torque do the work.
But they weigh 700 lbs. That's the only negative side.
I bought the Barra on an impulse because I heard lots of positives and virtually no negatives about them. And I know that the Ford big six is absolutely the best petrol powered truck engine ever made and figured the family connection was a plus.