ces codes on new long block

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coop1369

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just replaced 5.7 vortec in my 00 hoe, now have error codes p0108, p0121, and p122. any ideas? hard to believe the maf and the tps go out at the same time? also, tranny won't downshift when trying to accelerate. everything was fine until it threw a rod a few weeks ago.
 
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