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yep there are two types...one recirculates from the engine while the other has an opening where fresh air can come in...i got rid of the yucky one and got the fresh air....looks better to me....that is my opinion...to each's own
recirculating means it sucks in the interior cab air and heats it before blowing it out again. The freshair model sucks in fresh air from the right side cowl vent and heats it before blowing it in the cab. The fresh air model was the more expensive one. You could adjust teh temperature, have just cold air blow into the cab... One problwm with the recirc. heater is that if the air in the cab was moist, it didn't keep your windows from getting fogged.
I bought a new heater core from John's F-Fun Hundreds (F100.com). He had an exact replacment for big $, and one for cheap. The cheap one was exactly like the high $ one except for the in and out pipes. They were in the right location but were about 6" to short. What you do is: run the rubber hoses through the firewall to reach the pipes, or what I did, cut the pipes off the old core and connect them to the new core with a short piece of rubber hose. That connection is inside of the cab, and from under the hood it looks completely stock. Hope that made sence, anyway it was simple to do and works perfectly.
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XFM...
What are people using for a heater in their truck? I have a small Vintage Air unit that I was planning on using, but if there is anything that will look somewhat stock I would rather have that.
Nothing, it clutters up my engine bay I do get heat from the exhaust, with the crossover tube and mufflers being where they are and all. I do get a little bit of warmth... I just didn't want all those heater hoses and the fan motor sticking out of my firewall... I guess if I had really planned to drive it in the winter, I would have put one in, but it isn't my daily driver. I've seen some accesory plug in heaters at a few truck stops, I might actually look into one of those if I see I'm driving it when it's too cold.
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