Cylinders 3 and 4 are dead, why? Options

[Skid]

I just brought home a 73 1.7. This is the first 914 that I have actually owned, but not the first one that I have driven. My dad has always had a few 914's around and I finally decided it was time to get one of my own. When I first picked up the car, it ran pretty good and smooth. The original fuel injection has been removed and replaced with some duel single barrel weber carburetors and it has a 009 distributor. Like I said, the car ran pretty good when I first got it about 2 weeks ago. For the past 2 weeks I haven't driven the car more than just around the block, and suddenly, out of the blue, I went to go move the car and it is running bad. It has a definite misfire and, when I pull the plug wires off the distributor cap, 3 and 4 seem not to be firing. I have checked compression in those two cylinders and they are fine. I am getting fuel (I can see that the carb is squirting gas), and I have also tested to see that I was getting spark on those two cylinders. If I have spark, fuel, and compression, what am I missing? How could it just change overnight? I am pretty stumped here, my dad, who has worked on these things for over 20 years is also pretty stumped. Any ideas or help would be very appreciated.

(IMG:http://www.914world.com/bbs2/uploads_offsite/lh5.ggpht.com-3538-1273364830.1.JPG)

(IMG:http://www.914world.com/bbs2/uploads_offsite/lh4.ggpht.com-3538-1273364831.2.JPG)

And the mess of an engine bay..... (IMG:style_emoticons/default/barf.gif)
(IMG:http://www.914world.com/bbs2/uploads_offsite/lh6.ggpht.com-3538-1273364831.3.JPG)

Thanks,
Chase Birks