[stallion112]

Byron,
I guess I used the wrong terminology. I am using it as a recirculating catch can and not an overflow tank. I have it plumbed from the expansion tank to the bottom of the recirculating catch can and will use it as you described where the fluid can expand and contract. I have a 13# cap on the expansion tank and a 7# cap on the recirculating catch tank. I planned on keeping the 7# cap loose.
Thanks for the offer for the pdf file of the owners manual. I downloaded the file from you a few months ago. It happened to be the same as the one I have that came with the car. It's pretty beat so your scanned copy will be helpful.

Wizard,
Thanks for your advice, too. Looks like I was thinking along the same lines with the low cap rating on the catch can. I'll report back once I have a chance to get the beast started.