Is my 340 Overcarbed? Avg 5-6 MPG

What do you think is going to happen to your total number if you up the initial setting?

Why do you think I mentioned to NOT romp on it if you up the initial!

YOU NEED TO INSTALL A DIFFERENT ADVANCE STOP BUSHING IF YOU WANT TO BUMP THE INITIAL TIMING.

Very simple, there are two basic parts to timing with your set up. Initial is the first part, mechanical advance is the second.

Initial + mechanical = total

What you are currently doing may turn out to be a HUGE waste of time until you get the initial/idle settings sorted out.