I have a dual fuel setup that I believe to be almost as old as the truck (1986 F-250 460 w/[font=verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif][font=verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif]Holley[/font][/font] 4180 carb). I am having some troubles getting it to idle right in propane mode. It runs great on [font=verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif][font=verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif]gasoline[/font][/font]. Does anyone know where I can find some maintenance information for this setup. I've done a lot of searching, but I haven't found out much.

I have an IMPCO Model "E",
https://www.ford-trucks.com/user_gallery/sizeimage.php?&...oid=121696&.jpg

and a "Century" model 2610 mixer, that looks like it's made by Borg-Warner.
https://www.ford-trucks.com/user_gallery/sizeimage.php?&...oid=121695&.jpg
https://www.ford-trucks.com/user_gallery/sizeimage.php?&...oid=121699&.jpg
https://www.ford-trucks.com/user_gallery/sizeimage.php?&...oid=121702&.jpg
Thanks in advance for any help.
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