Mileage

That will totally depend on the gear ratio of the rear axle and on the tires. Anywhere from 10 to 20 mpg I'd bet. GW

I would say closer to 10MPG. Those cars weigh at least 4000 lbs.

snipped-for-privacy@some.rr.com

I was going to guess even lower, when I had a 77 351/auto it only got about

12 highway 6 city. Back in the 60's when gas was 15-20 cents per gallon I don't even think anyone paid attention to gas milage. I am guessing that someone with a 400 ci engine will also be driving with a leadfoot, not driving to conserve fuel. I recall that my father stated once that his town and country station wagon back around 1970 could go just over 100 miles on a fillup when pulling our travel trailer, that is something like 5 miles per gallon highway.

I meant 10 MPG if you driving it sanely. Yeah, if you get on it you could probably get gallons per mile. A few days ago I did a couple "high rate of acceleration" in my 71 T/A and used up 1/4 tank gas in less than a mile.