My 454/400 turbo has done as well as ten, but its in a 1-ton four-wheel drive. If mileage is a real concern stay with teh small block unless you really need the power.

And you can ship me the 454/400t!


1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble...