ramjet 350 fuel pressure and return line clarification

[56hotrodred]

I am looking for a little information on the fuel lines for the gm ramjet 350.

Which side is pressure/inlet and which side is return?

It looks like the left side fuel rail is -AN6 male nipple and requires a -AN6 female thread to connect and the right side is 3/8NPT which I don't know if it is male or female!!!

I am assuming that the pressure/inlet side gets the inline fuel filter and that it is the larger right side!!!

I do have the in tank fuel pump but am not at home to look at it!!!

Thanks much in advance.