Why not just put a couple of core plug heaters in the side of the block? I used to buy factory core plug heaters at the Dodge dealer and install them in race engines. It really helps in cold weather. Just plug them in for a bit and the block gets warm. No need to heat the oil if the block and water are warm.
I would if the engine was out of the car. It starts a whole lot better in warm weather and after warmup, but cold starts (<60 degrees) can be a little challenging, especially with the volume of the 440-25 intake. I know too many people that have blown them up on cold starts.
