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

In High School a guy in our automotive class had a '78 Z28. 350 4bbl, auto, 3.42 gears. His Dad ran a speed shop. I had my '72 Demon with a 318, added a 4bbl and dual exhaust. We raced and I let him punch it first, but I still pulled away, even with my 2.76 gears.

• But before I added the 4bbl and duals, I raced another Z28 that had been engine swapped - it now had a 327 4 speed. I raced him with my Demon 318 2bbl and beat him pretty bad!
• I also race my cousin's '74 Camaro LT-type 350 4bbl with my '73 Swinger 318 2bbl 904 2.76's and I won that race too !!! :D

I'd say the 318 would hold it's own in cars that should have been a full click up in class