Ok everyone I have a perplexing question. I recently acquired a 1954 Dodge C1 B6 truck. After careful research I learned the engine in the truck had been rebuilt at some point and it is NOT the original motor. Research of the block number showed the engine is out of a 1951-52 Dodge car and is a 230 CI. There is a rebuild tag on the side of the block listing how it was bored out and etc. The tag is a Montgomery Ward tag. It does not have a date so I have no idea when the engine was rebuilt. Now getting to my question. The engine runs great. Starts easy and runs very smooth. No misses or hiccups at all! The weird thing is it smokes from the draft pipe on occasion. It does not smoke even a little through the exhaust pipe. There will be times I drive the truck and there is almost no smoke at all from the draft pipe, but in the same trip it will all of a sudden start spewing a smokescreen of whitish blue smoke. Like a lot. So bad I feel really bad for the people behind me. Then I can stop at a traffic light or stop sign, pull away, and no smoke at all. Has anyone ever heard of this? I’ve checked the radiator fluid and it’s good. I’m not losing any. I do lose oil and I will leave small puddles where it is parked. The smoke smells like burning oil, but I suppose that would be expected since it is coming from the crankcase draft tube. Anyone have any ideas or thought? And by the way. The truck never changes how well it’s running even when smoking or not smoking. Thanks for any info.