I purchased the 1600 fuel rail kit from RP. I would like to know what is the difference in the (-6 ports) and the (-10 ports with fuel gauge port). I bought the -10 port because i wanted to add the fuel gauge. Do you think i should have bought the -6 port? I heard that the -10 port is bigger. So I need to know if it is too big. If so I will return it for the -6 port. Thanks!