Sounds like you'll have a hell of a motor when it comes together got any plans for the poor 091?
On the piston issue it doesn't make sense cost wise to use a cast piston. Even if you have already built the motor and gone through break in I would still strip it and get forged pistons. Those cheap cast pistons will cost you a fortune when they go, not if, when. It could be just a ring land (new piston and barrel maybe some head work), or maybe the piston crown goes (time for a new head, rod, maybe crank, cam, lifters, possible fire damage). The point is $200 now could save you thousands down the road.
I would also stay away from the wiesco pistons for a turbo motor. Even though they are forged the upper ring land is very thin and doesn't hold up the detonation under boost.
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