Flat top pistons for backyard budget 5.9 build.

JDMopar said

Does it matter? Not being a smart ***, just trying to learn...lol. Both are same 4" bore and 3.58 stroke.

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width of the rod is different (LA is thicker), compression height is slightly different (i wanna say mag is taller), mag pistons are considerably lighter (piston, pin & ring pack).

and you'll need a rebalance.