Routing fuel lines correctly

ONE THING you must be careful of with vapor return is ORIENTATION. EG the hemi/ sixpack OEM return devices were NOT filters and had a standpipe inside the can. This means they were oriented with the 1/4" return fitting DOWN. The Wix and other equivalent filters are the opposite, at least the inline ones. On those, the 1/4" return must be UP. The filter can be horizontal or vertical, but the 1/4" line must be up. I do not know about the 90 degree outlet ones.