what size sway bar for big block?

I'm going to make an order this weekend for my suspension parts so I can get the car back on the ground and was wondering what size sway bar you guys recommend for a big block. This will be the rest of my suspension:

-HSS-1907F "Hotchkis lowering springs"
-HSS-70010012 "Hotchkis shocks for lowering springs"
-AFC-20033LF "Afco Low Friction Lower Ball Joints"
-AFC-20037LF "Afco Low Friction Upper Ball Joints"
-PTP-7-217-BL "Prothane control arm bushings"

I run an ADDCO 1 1/4. The cars handles real well. This is with an iron headed big block.