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Note the deep intake valve relief and low top ring placement of the piston. Indy has these packages worked out to a science, and the considerations in putting together a working combo are pretty complex. If you're building a monster Hemi on your own, you better be prepared to work out all of these detail, like ring placement, dome height, valve relief depth, location, and a lot more. Trying to get it right on a one-off custom build can be pretty tough, or you can skip the guesswork, trial and error, and let Indy's experience with these combos work for you.