Smallblock efficiency or How to have your cake and eat it too

ir3333 said
A lot of stock 340's got 20 mpg back in '68 and '69.They really are the best all around engine in an A body!
I know a lot of guys with big blocks, big and small strokers or nasty small blocks that won't go to cruz night get togethers if they are more than 6 or 7 miles away just because of poor mpg.

In the mid 90's my brother had an all original and basically untouched 69 Cuda (340 4spd) and with 3.55's he could average about 17mpg on the highway. He never tuned on it but I am sure had he worked with it there was another 2mpg somewhere. Not bad for a 14" tire IMO....

JW