Re: warming the cab faster
My jeep is driven in North Dakota and Minnesota during the winter. That means cold in the morning and sometimes even colder during the day. With the mods to the CJ it can turn the cab passengers to toast.
1. Insulated the hardtop - nice difference, particularly with moisture buildup.
2. Did the header upgrade, but also channeled all of the air through the defroster to clear front window with amazing speed and force.
3. Took a part an auxillary rear heater from a van and built an oak box to handle the coil and fans. Purchased 4 4.5" computer fans that draw little juice, but put out a significant quantity of air. This reduced the depth of the heater system to 5" and other dimmensions to 10" by 10". and easily mounted underdash. Painted the box to match the dash and channeled outlets to permit air to flow towards passenger and drivers feet, as well as to force air between to the back seat. Hooked top two fans to one switch and other two fans to another switch and blocked airflow to permit one set of fans to blow air to feet and other to blow air to back.. Mounted toggle switches to each pair of fans on dash. Advantages - very quiet fans, move more than adequate amount of air, little amp draw, narrow so mounting under dash easy, and fans do have long life, easily replaced if one does die.