The dart cylinder heads on my truck do not have a crossover and I have have an electric choke edelbrock carb on it. In the winter I just start it and then hold the rpm at 1300 or so for 3-4 minutes or so, typically the length of one song on the radio. I don't have any problems with it wanting to quit or stall out in cold weather so long as I let the engine build a little heat before driving it.