I'm with Bill on the Wiseco Pro-Tru pistons I have them in my engine with K-1 rods with the 990 pins.My engine is right at 11.1 with flattops and and basic Indy EZ heads.
Nick Wilson over at www.compu-flow.com usually stocks the pistons and rods you need and can also cut the heads and help you with a cam to optimize your choices
Gus

6997181-mysavoy.jpg (61 downloads)

64 Plymouth Savoy
493 Indy EZ's by Nick at Compu-Flow
5-Speed Richmond faceplate Liberty box
Dana 60