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The true Vortec engines were used from 1996 thru 2002. They all came in trucks and vans. None were installed in cars. All came with TBI, never tuned port injection. The sure way to identify one is there are two bolts in each corner of the intake manifold. The bolts are vertical, not slanted like all others. And there are no middle bolts, just two in each corner. The last of the original designed small blocks. Good motors.

Because of the vastly improved heads they had to redesign the intake, but all other parts interchange with all earlier small blocks. These engines have one-piece rear seals and a hyd. roller cam STOCK!!

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Q: When did Chevrolet make the 350 vortec motor?
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