Mine's a Mallory Unilite; bought it from Woody at The Wedge Shop. A little pricey (aren't they all?), but I'm very happy with it. I also have a spare module for it, just in case. And I have the original Lucas distributor.
The hookup is basically three wires, including a ground. Very simple, but if you get it from Woody, he'll give you great help with the installation if you need it. You will have to swap the drive dog, but that's not hard at all.
Mickey