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Did you post this on CompD as well? I thought I saw something about this. As far as I know you can use the VP pistons as well as the CR pistons, but I don't know what the benefits would be of using one over the other, or if there are more apps out there. CompD will probably give you the best info.
There is a difference between pistons with the SO and HO configurations. The HO pistons bumped the CR up to 17.1:1 over the SO's 16.3:1. The marine variants are a QSB engine over our ISB's. A lot of parts interchange though.
It sounds like you're planning on pulling a lot of power out of it. I suspect you'll be running a lot of boost. I'd stick with SO pistons for that reason. Unless money isn't an object, then you could look into some of the mahle exotic pistons.
What does your builder suggest? Piston selection has alot of variables, and he needs to go over all that with you, or just trust him to do it for you. If its a daily driver, you may just want to stick with the SO VP piston.
Sometimes, people just HAVE to spend money on a mod no matter how useless it is.
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