A craigslist find.....
Gene
http://sfbay.craigslist.org/sfc/pts/912082583.html

 

I did not know Olds ever built a 312 with a tri-carb stock setup. My information shows the 57 & 58 Olds 371 engine with stock tri-carb as the only years available. Then it was not available until the late 60's.

Thats why I don't trust e-bay

 

I think the cid was a misprint, or they have no clue.

Gene