I'll take a pic of my setup tonight. I bought a Moroso billet 1.25 quart tank from Summit. The overflow from the radiator goes down to the bottom inlet on the Moroso. This was as vacuum is increased, the radiator can suck from the bottom of the overflow tank back into the radiator. I do have an overflow going from the cap of the expansion tank to the ground in case of massive overflow but you need to remove the lower gasket off of the cap on the expansion tank. A closed system can only have one cap (being the radiator in this case) that sustains the proper pressure of the system.
