I have a heater control valve, cable operated, from a Dodge, I think. Durn near universal, it's inline in the feed line and I control it with a universal choke cable. Any FLOPS can fix you up.
Looks like this, but naturally in plastic now:
http://cgi.ebay.com/ebaymotors/1951...emQQcategoryZ6755QQitemZ4585731626QQrdZ1