Routing fuel lines correctly

So im now running factory 5/16 line to the pump, 5/16 into and out of the filter with the 1/4 return and using a holley regulator to adapt the line 5/16 fitting in to 3/8 fitting out connected to a 90 degree 3/8 edlebrock banjo fitting with a gauge. The only fittings i can find for an edelbrock carb are in 3/8 so I would have to change the pump filter and hard lines to tank along with tank fitting to get them to match. Does anybody see a problem for flow or pressure with running a 5/16 system up to 3/8 at the regulator?