I have been running a non heat Clifford for almost a year. I had constant problems with the outside plugs fouling if it even thought of getting cold. I recently added a plate that is made to use headers with a stock intake and retain heat. your intake should have the bosses in the bottem that you will have to have drilled and tapped. I used copper tubing ran from a bung that was premade to my headers into the plate. Been running it about a week and the plugs look great and cold start up time was cut down greatly. Here is a link to the site where you can buy the plate and headers.(EGR Plate aka Carb. Heater)
http://www.fastpts.com/cgi-bin/hazel-cgi/hazel.cgi?action=serve&item=hrheader.html
