Lou,
The barrel that I just got was K&S Racing fuel 110 leaded octane. They change brands from time to time as they try to get the lowest priced ones. They also handle 114 leaded octane, but one of the guys told me it didn't improve his car at all over the 110.
I buy it at a distributor here in Redding and they deliver the barrels to my house.
And there is also this that might help.
Ron