Wrong. It's not like all the rest. It's a pig in a poke. You cannot get affordable off the shelf pistons for it. Some of yall need to clean your ears out. If it's not a Max Wedge, it's a piece of ****. The 413 has an oddball bore size and cannot be bored to a popular one such as the 440. It is not thick enough. I'm not even gonna come close to givin the guy bad advice.
SAVE YOUR MONEY FOR A 440!