If it's going on a stock motor, you might as well stick to the standard 009 Bosch distributor system, it works really well unless it is a high-rpm engine like Larry said. The difference between the 6AL digital and the regular 6AL box is that it has a rev-limiter built-in and it is very small and light, it fits perfect inside a very small-skinny ammo-box that has all of my fuses and relays in it. The digital one also can let you adjust your rev by as low as 10's instead of 100's and don't have to buy a pack of 5 or 10 "pills" to get the desired RPM you want to limit, the digital goes all the way up to 12,000 rpm (in which it will never happen LOL) I can adjust it to let's say 7250 rpm instead of 7200 or 7300 rpm in which it probably does not make much difference at all LOL
I just like the box because it's light and small. If you have the $120 to spend on a system, save the $$$ and run the standard stuff and then when you go bigger like a stroker motor, then use it on a MSD system. Try looking into a Pertronixs system, they have a nice distributor and coil-pack, it runs really well on Pipedope's buggy, you can get them from Drew's in Cincy. I done some looking into the Jacobs system, it runs very well on the street according to a forum I looked at earlier and they love it, but I dunno how it will hold-up in the woods.