Miles per Imperial gallon?

The Mag engine has a much better combustion chamber, might be worth 3mpg over the typical 360 head.

I'm going out on a limb here, but I'd suggest a 5.2 Mag motor, built correctly. Board members say the built 5.2 Mag and the LA 360 in near-stock form are quite equivalent in terms of acceleration, but the 5.2 increases mpg by something like 5 or 6.

Seeing how you like to drive the car, and it isn't primarily a drag racer, this sounds like the way to go.

R.