Intake and carb choice
I always thought that vacuum secondary carbs sideways on a tunnel ram would not feed the secondary side very well at anything under WOT. Both my OFFY and WEIAND tunnel rams have plenum dividers in the upper section that would seem to be a little restrictive in the lower rpms. Center squirters like 660s with the roller linkage are set up to open simultaneously and don't have that to worry about if mounted sideways or otherwise. I haven't tried what you have so I am just asking. I am thinking that on the street your plugs would read a little different on the secondary side? I run a pair of 6425 650 2 barrels I converted to side pivot on a very mild 440 so it acts pretty much like a dominator with 1:1 linkage only better distribution on the manifold.
I always thought that vacuum secondary carbs sideways on a tunnel ram would not feed the secondary side very well at anything under WOT. Both my OFFY and WEIAND tunnel rams have plenum dividers in the upper section that would seem to be a little restrictive in the lower rpms. Center squirters like 660s with the roller linkage are set up to open simultaneously and don't have that to worry about if mounted sideways or otherwise. I haven't tried what you have so I am just asking. I am thinking that on the street your plugs would read a little different on the secondary side? I run a pair of 6425 650 2 barrels I converted to side pivot on a very mild 440 so it acts pretty much like a dominator with 1:1 linkage only better distribution on the manifold.