Don't listen to the above as it is just BS, the links I posted are of my 4ag running the standard dizzy and ignition coil (no igniter needed), using the bosch ignition module like that from an ae82 dizzy (on the coil in my 2nd link/pic above), the only thing you need advance for is economy, you will not lack power without it, if you wanna do this then here is where I got the idea from:
http://home.clear.net.nz/pages/phil.bradshaw/modifications.htm
I know people are here telling you that it is going to be a slug and what not but it is a damn lot easier to sell a car while it is running then not, if you get stuck then feel free to pm me.