I will see if I have a photo (my car is on vacation in snowy Buffalo right now). Post a photo of your setup if you can.
You may not have a problem. You should not fill the expansion tank all the way to the top. Half full should do it and you should be OK.
I have a catch tank on my Superformance for track days. Purchased it from Performance Unlimited. I also use their remote breather. They work well and look great! Here is a link
Cobra Valley's Surge, Reservoir & Breather Tanks
They also have tanks in stainless and billet.
Hope this helps!
Jim Kellogg