Coolant loss after driving a couple hours.

[Dumpling]

Not sure why it being a Shelby disallows use of a recovery tank. Shelbys don't clean up after theirselves?

I use one of these:

http://www.billetspecialties.com/cooling-components/overflow-tanks/

[67428GT500]

There is no room to run even a two inch on the right side of a big block radiator.  As for cleaning up, It's not leaving fluid anywhere I have parked.
I drilled a hole in the top of a 20 oz BAI bottle. Short enough to set under the battery tray corner. When I drive it tomorrow evening I should know pretty quick. This isn't your dad's truck, or a drag car. It's a real Shelby. You don't start cutting things or drilling holes to accommodate bottles and such that don't belong. I am running distilled water at this point until I figure out where it's going.  If I could hide it on the outside of the engine compartment in the fender area that would work well. I don't know the system would pull the coolant from the tank back into the radiator as it cooled.
                                                                                    -Keith

[Dumpling]

Big block radiator here and it fits fine mounted to the side of the radiator, but it's not a Shelby, but it is a Cobra (Fairlane).

[67428GT500]

There really is no room on the right.

[winr1]

I have see more than a few water pumps pee out of the hole a few minutes after mill is turned then stop

Some would leak 30 or minutes later then stop

Shine a light under the bottom of water pump weep hole perhaps ......



Ricky.

[My427stang]

I would just reiterate, anything before a pressure test is sorta guessing.  The tools are cheap and easy to use, and will pay for themselves with peace of mind

Pressure check the cap, see when it releases compared to it's rating, then take the cap adapter off and pressure test the system and let it see to see if anything starts weeping.

It is true a catch can is nice (and generally required to race) and even nicer is a recovery style can and cap that will draw fluid back in when cool, but in the end, the tool will let you a lot. 

I don't use mine every day, and in fact, I bet once a year nowadays, but when I do, nothing will do what it does for providing info on leaks.  The next step after that can be dye, but I haven't had to go there on a classing engine because you can typically see everything pretty easily