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As far as I know the more you advance your timing the higher your emissions, although I can't remember for sure if it is HC or CO that goes up. If you don't pas the sniffer test then reset your timing to about 6* btdc or so.
BTW was that your Suburban at Poore Brothers, off of MC-85?
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Andy,Phx AZ
'67 C-10 (Ahhh, done at last. Well there is that disk front end I want to put in and...)
"23 C-Cab-sold
'48 Ford 8N tractor(still working)
'67 Scout(Now on the road)
'70 MG B.-sold
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