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i dont have feelings
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519 Posts
when you put vortec heads on an older block, there is a hole that must be drilled in the surface of the head. only one head needs to be drilled - for the passenger side. youll see it if you put a head gasket on the head, its at the front..drill it 5/16"

also, to run an older intake you can drill holes in the heads to adapt to the different bolt pattern, but i wouldnt suggest it. theres a plate you can get to line the holes up. youre better off to run an intake that bolts right up...i think edelbrock makes one that will bolt up and has a 4bbl on top.
 
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