I have just finished putting it back together- lower manifold- while replacing seals and gaskets along the way. I changed out the plug lines, the split from the positive battery cable to the fuse, and adjusted the plug gaps from.090 to.060. I still have a sputter with a strong fuel smell coming from the exhaust. I did remove an excessive amount of stop leak from the coolant areas, but can't get the cabin heated. In this cold weather, we need the heat.