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Re: 4.3 vs 4.3 vortec
The Vortec heads have a different intake bolt pattern so the older 4.3 intake will not work on the vortec heads.
Not sure if there is an aftermarket intake for the Vortec heads to use TBI. There is for the 5.7, just not sure on the 4.3.
//2000CAYukon
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