I bought a set of Probe SRS pistons, and the quality is second to none. 11:1 might be a bit tough though, prolly going to have to find a set of domes. I think flat tops should put you in the 9.5:1 range, depending on Combustion chamber cc, etc etc. Can always knock .010" off of those Canfields too, but then you may need to get the pistons fly cut for the valves. Just my $.02
http://www.probeindustries.com/Pisto...ord_302_ft.htm