TOH: Thank you for taking the time to help.
About the return: it doesn"t show in the photo because it exits out the bottom of the valve assembly. There is a filter cartridge hanging there, then a return line. Old and rusty. Appears to have been that way forever.
About the pump, the reciept shows:
L827-10X-LB Front Loader Pump Ford 8n NAA 600 + Massey Ferguson
Now here"s an oddity. It DOES lift when the lever is pushed forward, so I have standard operation. BUT, when I bought it, it ran the other way, so I switched ports with the quick connect and the presure line to reverse the operation to standard.
Description of plumbing: The pump has 1-inch ports reduced to 3/4. Then to 1/2 inch. The pressure line runs to the spool as shown in the photo. The return line runs through the filter back to the tank. Sorry about the misleading photo which shows an empty quick connect. That"s where I put in the 3/8 line mentioned in the OP. The 3/8 line runs down to a Tee which goes to both cylinders.
Again, thank you. --Peter