I have the same problem 1 and 2 are always leaner than the rest.
I jet it up so 1 and 2 are ok, the rest look a little fat.
I also use an M1 manifold
Dave
I had the same issue.
Had a rpm air gap and was running 11.3's, changed to a mopar m1 and ran 11.0. felt much stronger up top.
I have a quickfuel 1050 and 1/2 inch fuel line with a magnafuel 500 pump
also have a 1 inch spacer
Cheers
Dave