Did someone say "Cooling Tanks"?
This was more of a challenge. My tanks were shot. The swirl tank had failed in the early days of the car, and had been repaired. Cutting it open and looking inside showed it to be unserviceable. The same situation was found on the overflow tank. It was held together inside only by the big chunks of rust.
I half-heartedly looked for some used ones (which of course needed to be in pristine condition). None could be found.
In consult with a master mechanic and fabricator, we decided on an approach that would cause the system to actively draw air from the radiator and the swirl tank into the overflow, by running it at a vacuum. It looks pretty slick. I believe the design was described in one of Carroll Smith's (manager of the Shelby Racing Team) engineering designs.
Here's the pictures. The two fittings on the tall overflow tank are the inputs (one from the top of the swirl tank, and one from the radiatior via hardline). The lower fitting is suction from the waterpump.
The overflow tank is under suction from the water pump, and will actively draw any air from the upper corner of the radiator.
The rest of the cooling system is standard, except the pressure cap has been moved to the overflow tank.
Here's what the tanks look like:
Getting tired of this yet?
More to come!