Kevin, What year is your WC? Does it have a magneto or does it have a distributor with points/condensor and coil? When you say you replaced the ignition, what exactly did you all replace? Rough running from ignition side can be from the spark plugs, spark plug wires, wrong firing order, incorrect point spacing, bad coil, bad condensor, bad distributor cap. Firing order should be 1243 if I remember right. If you had the carburetor apart and put it back together, their may be something that is in the carburetor restricting the fuel or an overlooked adjustment. It can be frustrating figuring out why something isn't running right but with some patience and tracing things down step by step you should be able to trace it down. As far as the oil pressure goes, what filter did you use. The new wix and napa filters are causing a lot of problems for oil pressure on the old AC's. Get a Hastings or Baldwin.