Dale -- heaters are for sissies!!

Just pull the floor mat up and let the heat from the exhaust and engine come up through the floor board to keep you toasty! It works on our trucks in the winter!
Peg and I rode over to our daughter's house Christmas Eve in the '49 -- it was about 15 to 20 degrees out and we were comfortable in the truck. Peg had a blanket, though...
Have a fun trip! You'll be having so much fun, you won't be cold!
Regards,
John.