Do you mean to swap from your DS2 set up to the Pertronix?
Here is my old write up:
http://www.kastang.us/pertvds2.html
I'm not saying either is better, but both are improvements overstock. Personally, if you already have the DS2 installed, I would stick with it. I've been running my DS2 set up for almost 4 years now without a single problem. My Pertronix nearly left me stranded once (tape on the magnets peeled off). I went DS2 to have an over the counter ignition that I could run to just about any auto parts warehouse and get replacement parts for. To me, that's important for a daily driver.
If however you want a more stock look with better driveability, hands down the Pertronix is the way to go. I consider my break down a freak accident and rare occurence for Pertronix based on anecdotal evidence from this forum. I have no problems recommending this system either.
However, I would stay away from that distributor. I had one like that for awhile and hated it.