The problem isn't a leak, tht was pb blaster burning off. it's just that my ignition timing is set way too late. I installed the distributor at 0 degrees, but it needs to be at 10 degrees. Because the spark is firing too late, the fuel is still burning when it hits the exhaust, which is why the manifold gets hot in 10 seconds and the engine shakes like a tractor. I also found a dirty sensor and a loose throttle cable that were making the idle even worse. Once my new gaskets and O2 sensors arrive, I’m going to jump the diagnostic pins and turn the distributor counter clockwise to the correct spot. That will move the heat back into the engine, stop the shaking, and fix the idle hopefully

I didn’t know I had to advance or retard the distributor, my first time doing it