My car is 5/16 all the way through - put a Holley dual feed on today and using the supplied 3/8 hoses for now - best way to step - up from 5/16 - 3/8 between pump and carb ? I was hoping for a barbed adapter at Advance or Home Depot. Pump has 5/16 , short hard line on outlet side that does a short "U" (340). Is stock pump enough PSI for a 670 Avenger ?