225 /6 at 250HP?

I could do the v8 swap, but its so common and I understand why. But, if I go through the trouble of swapping to a different motor it is getting a modern EFI built engine with the transmission (maybe going to the extent of an AWD setup). My '72 Scout2 and '56 Willys Pickup are for the large V8's and high HP.

I would also like to try and get decent MPGs I know some who have turbo'd the slant six have gotten 30 mpg (not what I expect, but if it happens). I know my Mustang got 28 mpg even with the top down on the freeway at 80 mph. If I got 20 I would be happy (my father was getting 24 mpg the way it sits now).