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are speedpro hyper pistons any good?

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recipe

I plan on using them in a 109 block, rotate weight balanced. TA-49 + alcohol injection with no more than 20lbs of boost. Upgraded fuel delivery and 43lb injectors. Dutt-necked intercooler, Mild Postons 107 cam and some port work done to the iron heads and lower intake. Everything else is stock on this 87 GN.
 
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