I did the search thing and found several good ideas, mainly I like the plastic tank ideas for quick visual checks. BUT I have an idea and wanted to run it by the "brains that be" on this site. My SS is a 72 so it has the charcoal canister attached to the left side of the radiator. It's long since been plugged off and is not doing anything but riding along. I was wondering, would an overflow tank mounted in that position with a vent/return line from the radiator cap running back over/along the top of the fan shroud, would it still work and draw properly?

Just hate drilling anymore holes and since I have a functioning A/C system I don't really want to move that line that is behind the battery to install a tank on the right inner fender.

:confused:
RA

It would work - in a closed system, the pressure from the radiator fills the tank, the suction as it cools draws it back. In an open system, the pressure from the tank would overflow into the can, but not draw back - the radiator level would find it's own equilibrium and stay there unless you refilled it to the top again.

I did the search thing and found several good ideas, mainly I like the plastic tank ideas for quick visual checks. BUT I have an idea and wanted to run it by the "brains that be" on this site. My SS is a 72 so it has the charcoal canister attached to the left side of the radiator. It's long since been plugged off and is not doing anything but riding along. I was wondering, would an overflow tank mounted in that position with a vent/return line from the radiator cap running back over/along the top of the fan shroud, would it still work and draw properly?

Just hate drilling anymore holes and since I have a functioning A/C system I don't really want to move that line that is behind the battery to install a tank on the right inner fender.

:confused:
RA

This is what I did on my 72 with AC. This way you can leave the canister and hook it up OR eliminate the canister and put something else there. Like a remote power steering pump as shown in last picture.

http://inlinethumb48.webshots.com/31791/2511800770100380351S500x500Q85.jpg (http://good-times.webshots.com/photo/2511800770100380351XSSIta)
http://inlinethumb42.webshots.com/33705/2127337430100380351S500x500Q85.jpg (http://good-times.webshots.com/photo/2127337430100380351IUknqj)
http://inlinethumb37.webshots.com/31908/2446209210100380351S500x500Q85.jpg (http://good-times.webshots.com/photo/2446209210100380351sfSKms)

Another option is to use your windshield washer canister. I like being able to monitor level with just a glance. A plastic "L" inserted into the bottom of overflow tube, and you can route rest of tubing so everything is hidden. Some blue antifreeze and no one will ever know.