Supposedly, I have seen a diagram showing the hoses, one tees off the heater line and the other goes to the nipple on the radiator filler neck. I have never seen one, or even a throttle body with the nipples on it. Even the 1988 I pulled one of my original EEC-IV boxes from didn't have that. The 1990 parts truck also didn't have it.
In the pictures you can see the nipples on each side of the throttle body.
Bill AKA "LOBO"
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"Getting old is inevitable, growing up is optional"
Darth Vader 1986 F350 460 converted to MAF/SEFI, E4OD 12X3 1/2 rear brakes, traction loc 3:55 gear, 160 amp 3G alternator
Wife's 2011 Flex Limited
Daily Driver 2009 Flex Limited with factory tow package
Project car 1986 Chrysler LeBaron convertible 2.2L Turbo II, modified A413