Could you confirm what you have for a distributor cap. Just incase it's not one of those "correct-a-cap" things with internal routing for left bank/ right bank set up.
EDIT (Back from search) Looks to me like any of these are side exit "crab" style caps, "correct a cap", "crossfire", "vortec", or "hei corrected" to name a few. Does not look to me like this could be a possibility??