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Be careful that your pistons fit the Indy head chamber.When ordering pistons we always specify for Indy head chamber. I would ask for the flow sheet for those heads and the chamber size and volume.Still wandering 450 cfm at what lift?

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that is exactly my point! i specified cp hemi pistons to kenny and he said absolutly no problems with fit! now i know the difference and you already know it. i got lied to and two years later i still frustrated.

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Jimi,We had the same problem years ago with a set of pistons we got from Chrysler,they smacked the heads front to back.They beat off the chamber and grenaded the engine in the lights at 142mph.It's not something you soon forget.