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Old 03-18-2007, 06:05 PM
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The later vortec heads will work but the syclone lower intake manifold has to be machined or the cylinder head manifold bolt holes need to be welded up and re drilled I have a set of those mid 90's vortec's for my 91 S-10 "syclone power'd sleeper" but will need to get this done when i get around to doing the swap.
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