[bdtutton]

I have a 1930 Tudor and it is cold here in Michigan in the winter. I bought an aluminum manifold heater from Snyder's last year that bolts onto the stock manifold. It does require you to cut a hole in the fire wall, but it works well and is easy to take off in the summer.
It kind of feels like you have a hair dryer blowing into the car when you are driving down the road...Most of my trips are only a few miles so it only has time to warm the car up by about thirty degrees. So when it is 30 outside it brings it up to 60 pretty quick.