im not to shure about the intake definatly possible it dont look oily plus its all 4 witch is leading me away from the intake . did it idol alot maybe hes got the idol mixture screws all jacked up after all its a dual plain intake super ritch right bank and an ok left carb issue ? you have a fiew good ideas where to look
i had a customer with one of those carbs did the exact same thing turned out the carb was the problem holley sent us a new set of metering blocks because they had a problem with some of the ones they sold.
wasnt a pefect fix but it was better and we were able to tune most of it out,later on switched to a proform 750 and the problem was gone.