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Old 08-04-2013, 11:33 PM   #1
tommartin
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Re: thermostat housing help - 79 k10

so I replaced my thermostat housing and both holes were threaded, so i just put a plug in it. So both holes are plugged. Would still be good to know what both are for. Thanks!
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Old 08-06-2013, 04:25 PM   #2
motornut
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Re: thermostat housing help - 79 k10

3 tee i think is EFE and Vac advance
2 tee is the EGR
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