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i wouldn't do it the vortec heads will have a diffrent port for the intake and intake mounting so you would need to replace the whole top end and in the big motors you can run into push rod angle problems but prolly not in a 78 easiest way to get the power you want is to put aluminum heads on or a power package from edelbrock, weiand, world, summit, jegs, or anyother major company

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Q: I have a 1978 stock 350 and i want to put vortec heads?
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