355, this makes no sense...
Here's the scenario; it doesn't make any sense to me.
I've been dealing with about 9 MPG with an 89/92 mix in my `84 3/4 ton since I rebuilt a 350 for it. This past weekend I hauled nearly 2 chords of oak firewood in one load about 110 miles and only burned 10 gallons of gas (11 MPG average)!
Driving conditions were the same - level terrain, same speed, etc. The only difference is that she gets about 2 MPG more with a load. Does this make any sense to anyone? It's got me dumbfounded.
350 + .030" (355), KB flat top pistons, 76cc iron heads
Edelbrock Performer intake, new 600 cfm Edelbrock carb
headers, 2 1/2" duals, middle-of-the-road cam (not whimpy, not agressive)
SM465 (1:1 high gear), 4.11 gears, 35" tires
Is the engine finally breaking in and getting more efficient? It's got about 1000 miles on it right now.
If shortcuts were easy, they would just be The Way[img]/wwwthreads_images/icons/wink.gif[/img]