I would try decreasing the fuel pressure regulator and ensure that the pump you have on it is correct. How long does it run, does it drive? If so for how long? When you say misfire does that mean backfire? Does it start when it is cold and hot? It really sounds like timing if you are getting misfires and gas in the oil
Misfire does not mean backfire, just the occasional 'bump and miss'. It starts just fine when cold or warm. See the video I posted.
The timing is dead-on the marks at 5deg BTDC.
Again, note that I'm responding with a bit of humility: Something I "know" is clearly not true or else I'd have figured this out by now.