I agree with sampling and measuring the amount of fuel from each injector. If there are noticeable differences, you can swap injectors to see if it's injector or line-related. If a given line is questionable, feed it from a different FD port to see if the condition changes.

Space is tight, but here is how I do it, propping the airflow open with different size bolts to simulate higher speeds.

Jumper the LEFT side of fuse 7 to the LEFT side of fuse 5 to run the pumps.

I sympathize with anyone who has a k-jet system problem. Don't get me wrong, I like the system. Its just that it can be a B... to troubleshoot since its mechanical and there's nothing electrical to measure. It was stated here that JC Whitney has the best deal on the gauges. I don't understand how two cylinders could be running rich but the mixture is correct. I think the only thing that could cause unequal flow, besides clogged injectors, is the individual diaphragm regulators in the fuel distributor. Are you sure those two cylinders weren't different before the loss of power? I would recommend a test setup consisting of clear plastic hose and individual bottles for each injector. Then jumper the fuses to run the pumps. Let the bottles fill a ways and then compare the volume of fuel in each. You can also move the air meter arm to vary the flow, use a piece of hose, to verify the flow is changing with load.

...im running rich on cylinders two and three...

Have you replaced the cold start injector? It lives in that general vicinity and would explain better why the center cylinders run rich while the outside cylinders do not.

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Mr. Shannon DeWolfe -- I've taken to using mister because my name misleads folks on the WWW. I am a 52 year old fat man. ;-)