Southern diesel, moving North

I've got a 1984 300SD, and I currently live in Atlanta. It's 20 F outside right now, and I can't start it. Letting the glow light go on and off once isn't enough, and if I do it more than that, it doesn't have enough juice to crank.

First, is there someway to fix this? Second, I'm moving up north to RI in Jan. I'm concerned my car won't be able to handle the weather. It was originally purchased in South Florida, and it doesn't have a block heater(or even seat warmers). Do I need to find a new car, or can this one make it up north?

Thanks,
Ryan