If you're talking about manifold gaskets, any auto parts store will have them, try and get the kind that DON'T have the metal backing on one side, the ones you want are here http://www.jegs.com/i/JEGS/555/210355/10002/-1/937111%7C10259.  Did you ever sell your upswept manifolds?

I'm looking for the gaskets between the manifold and snails.  I still have the upswept too.

Check with Tom of JBP or cpperformance.com or maybe Hardin Marine.

When I put on the roller rockers and a stud girdle it required tall valve covers.  The upward manifolds
hit them.  I wish I could run them as they have a much nicer tone than logs.

I have them on my spare engine but I should probably sell them since I had to move my exhaust exit through the hull.  I would need longer hose for them to work now.

Make me an offer I can't refuse and they're yours. 

   $400 delivered back at cha

Thank you, I have 2 sets on the way.