If you plan to continue running E85, then you should be able to rock the 3.2 once you get the cam in. If you want to switch back to gasoline, I would suggest you stick with the 3.4.
With 9.5:1 pistons, and an XP cam, I was switching back and forth between a 3.1 and a 3.2 on my gen3 with gas.
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