The original setup had the main return line coming out of the surge tank on the drivers side and into the radiator.
You can see a picture of CSX3056 here:
http://www.csxinfo.net/detail/14.JPG.html
The surge tank also had a second smaller line, (not the overflow) going to the upper left (pass) corner. It looks to be about a 3/8" id line.
What is the purpose of this second smaller line. I don't see it on the replica cars with FE engines.
Sorry for all the newbie questions, it's hard for a Chevy/Mopar guy to learn about FoMoCo, but again, thanks for your help.
Paul