Into the weeds engine design for fuel efficiency discussion.

mgoblue9798 said
Guys I appreciate the input but I am really only looking for answers to the specific questions I mentioned in my posts above.

All the general stuff mention I have a good handle on already. I didn't mean for this thread to be a catch all for fuel mileage ideas.

I am specifically looking for input on the types of parts I outlined in terms of fuel efficiency and octane tolerance.

I would choose quench heads. A 318 or 360 Magnum. In addition to the other videos I mentioned, try Powertec 75. A bunch of this is inexpensive things you can do while the engine is apart, to develop better combustion efficiency. This promotes torque and fuel economy.