Hello all! I just bought a really sweet 1948 buick with lots of custom work. I have a few questions. The owner said it was a four speed automatic with overdrive. What transmission would this most likely be. I'm going to jack it up and get serial numbers tonight.

I found the engine serial # it's 32 Gm 3970010. I'm not sure what the 32 means. He best I can tell its a 69-79 350 and could be a 2 or 4 bolt main. Can you help me determine more! I want to do an oil change right away. I've been told older models need an additive. What oil should I use and additive? I was told it has a mild cam and an edelbroch performance intake. Thanks for the help