Runner length on these Tunnel Rams is pretty close to a cross ram around 8 inches long. When I have talked to a lot of builders of after market tunnel rams and this is their words is that the placement of the carbs does not matter to the intake. This is the bath tube style big plenum intakes on a lot of big hemis running in NSS. I have to take their word on this never have owned a cross ram Super Stock intake but other I know have run spread type and near inline type with near same times on the track.