Next shot is overview of regulator and line to carb.

Line runs behind carb linkage in front of regulator bracket to a fitting on the underside of the regulator. Fitting is 3/8 pipe on the regulator 90 degree to 3/8 hose nipple. Previous one was different, but leaked, and required removing regulator bracket from intake bolts to remove fitting. NG. Hence, the refit. Inlet to regulator is on the bottom. Two outlets for a Holley carb; one used for the outlet to the Edelbrock, one used for a pressure gauge, which faces forward.