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Re: 69 GMC LS Swap - ports on intake
sounds like cap the first 2 circled items (brake booster and front evap fitting).
the lower one circled, coming off the valve cover pass side front, you want to hook to fresh filtered air (intake tube). this is the PCV clean air draw.
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71 C10 long bed, 2003 6.0L, 06GTO E40, T56, 12bolt 4.10 rear
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