Well, I am in the 8mpg club too it seems. That is based on only 87 miles of local driving though.
I am still getting to know this car. It does have a replacement engine - a 360 - and I know it has a 'hotter' cam fitted - but still, 8mpg is ridiculous. It seems even worse here because that 8mpg is per Imperial gallon and equates to only 6.4mpg per US gallon
.
The carb is one of these
https://www.summitracing.com/parts/sum-m08600vs apparently 600cfm. It may be too much or it may need tuning. There certainly seems to be a smell of fuel in the exhaust.
Anyway, the car is now on jacks, laid up for the summer while we escape to our summer home in Nova Scotia.
David