Stock 6 in a 67 C20

[Surfdaddy]

I have a 61 GMC so I'm over in that fourm mostly. A guy ar work has been lookin at the progress of my truck and said he has a 67 C20 fleet side sitting on the side of his house, and has been for many years. It was his fathers (this guy is 62) and after we talked he said it has a straight 6 with a 3 spd that they put the shifter on the floor. He though it was a 230 and I though it was more likely a 292. Any thoughts of what it really might be? If it's a 6/3on the tree combo I'm guessing it's a base model with nearly no options. but I would't know until I looked at it.