I am plumbing fuel system and have a question. Running external Walbro pump to my LS engine. Using the Corvette style filter/regulator. Which line is which? It has 3/8 and 5/16 on one end, and 3/8 on other. I think the (IN) side is with the return one the same end and the (OUT) would be by itself.
Can someone verify this? Nothing marked on Filter, no instructions????
Thanks