Yea, it doesn't have the heat cross over holes in the heads to warm the intake. I live in CT and my neighbor has a 5.9 carbed magnum.

It's kinda a pain to get running in the cooler nights in fall when he is still cruising. It's not driven in the winter, but I know he told me when i was looking at building one that he would definatly put a block heater for daily driving.

Never looked into it much past that.