Well no luck on the air filter or the fuel filter - changed both with the same results. I did find a bolt loose - one of the ones that bolts the intake/exhaust together. I'm now thinking that maybe the gasket seal was broken. I did tighten it and it still runs the same. Maybe my tomorrow project should be to put new manifold gaskets on.
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67 LWB GMC
250 inline w/4spd manual
Disc/power brake conversion
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