I have done a search, and found this question, but no answer. About 5 years ago, I came into possession of a '49 Olds 303 that was supposed to be completely rebuilt. I have pulled the valve cover, intake, and valley cover. It sure looks rebuilt; everything is clean as a whistle, and it has Gotha adjustable rockers (the engine was completely sealed when I got it and always stored inside). I would guess that it has never been started. I have no idea how long it was stored before I got it; it wasn't for a short time from what I can see. My question is, what do I need to do to start it? I have an engine test stand with all the accessories (gauges, radiator fuel tank, etc.) that I can mount it on. I would think that I could drain and change the oil, add a can of ZDDP additive, and dump some break in lube in the valley. Then I would like to pre-lube it. I have done this a few times on a SBC, but never on an Olds. Is there a special fixture needed like a small block? What is the procedure? If everything checked out, I would check the valve adjustment and then try to start it. I don't want to tear it completely down, but on the other hand, I'd hate to harm the engine. All ideas and comments (including clever smart-ass ones) are welcome.