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Old 08-21-2010, 03:30 AM   #42
HOGDADDY
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Join Date: Jul 2006
Location: Alabama
Posts: 577
Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???

Quote:
Originally Posted by motornut View Post
now i'm curious........not up there?
That box above the heater/ac box is the computer (ECM). You will need to change out distributors to an older pre-81 HEI and if carb has wires for mixture it will need to be changed.

Also in pic looks like your heater/ac diverter valve is broken.

http://67-72chevytrucks.com/vboard/s...diverter+valve

Last edited by HOGDADDY; 08-21-2010 at 03:30 AM.
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