Honestly...how good was the 318...mpg / durability / hp

I've owned too many 318's to know the exact count, but here are a few facts that I know. Personal testimony :D
As for MPG....

• Best MPG was my brothers '76 Dodge Aspen R/T. 318 2bbl with the OD 4-speed easily got 24 mpg on the highway.
• My '72 Demon 318 2bbl with 904 and 2.76 gears would get 21-22 mpg

As for Performance...

• Best ET was 15.9's @ 84 mph in a stone-stock 318 2bbl with dual exhaust. B-body, 904, 2.94 gears.
• However, my fastest 318 2bbl was my Demon, but I never made a pass at the track with the 318.

As for long life.....

• my neighbor had a late 70's model maxi van with 246k on the 318 4bbl when it caught fire. It was still running good and hauling passengers (car pooled) up to that point. However, it wasn't hard to find a 318 with over 200k and still purring like a kitten. Always needed a timing set to get there, and a valve job would keep them purring like a kitten once they got there but wasn't necessary. Oh, my neighbor down the street had a maxi that had 320k on it (car-pooled also), but it was a 360 4bbl van. All small block mopars could do it with care, that's my belief