Oil Spray - Help Please

[rdkuffel]

1971 Chevy K10 with SBC 350.
Sorry for the longish post, but I wanted to write all the symptoms.
Yesterday, I started my truck after it had been sitting for 2 weeks. It ran very rough and wouldn't idle. I drove it anyway thinking it needed to warm up since it had been running great and smooth. Anyway, it left an oil slick on the road and oil had sprayed from the front of the engine and seemed to be more concentrated near the fuel pump. It looked like it could have come out from below the heads or possibly at the oil pan (which has a new gasket). It is hard to tell because it was blown around from the fan. It actually smelled of gas too. When I first started it, the oil pressure gauge did jump to high and then settled back a bit. I think it has been running high for a while, but figured it was the gauge. I let it sit for a couple of hours and then started it. It ran perfect again with no oil leaks or spray and this time the oil pressure gauge had normal readings which makes me think I had very high oil pressure. The dipstick read just slightly above full (1/16") which concerned me a bit. I took off the old fuel pump which tested fine but I installed a new fuel pump anyway and again, it ran great. The PCV valve was working fine and the breather was new too. Any ideas as to what may be going on??? Thanks!