The carb boss is 9/16 by 24 thread that uses a thin crush washer.. the fuel rail has 6an female swivel fittings... I'm just afraid that it's all going to run into the nitrous solenoids that will likely be on that side as well... With all the linkage and everything on the driver side I just don't see the solenoids being able to go over there.. I really need to get my 90 degree female to male 6an adapters to get out of between the carburetors and get the solenoids mounted up so I really know where everything is going to be at..