You should figure want you think fuel consumption will be because 150miles for one build is 80 for another for same size tank. I planned to run a 16gal tank with my built 383 in my 80 Shortbox because it would be a 60mile round trip to town and back. so 30miles one way but could top off before the trip home. with 2-750 Eddys I believe hp383 said it got 4mpg with 4.10s

Last edited by 76dodgeboy; 04/04/13 10:07 PM.