Woofwagon
Adventurer
I think so too. The Cadillac will hardly be working to move the mass of the Suburbillac. I do have the the 454 TBI system that can control a 4L80E transmission, so that would be a further mileage boost too when I get that installed. I want to save up for everything here first and install the Caddy/trans combo as one unit now that I think about it.