Okay you have a lot to learn. It's 340-360--318 and a 273 are all small blocks. In most cases you wouldn't be able to tell them apart except for internally. One is not going to be externally bigger than the other. Nowadays a 340 is for the original car mostly. People would rather get a 360 for lack of better words and to make it more easy for you to understand trick a 360 out. like I was saying you got a lot of hodgepodge there. And unoriginal sticker on the hood no carpet a different colored bench seat and not an original motor. Any one of those for small blocks that I mentioned would attach to your transmission. A small block transmission is a small block transmission. Like I was saying you need to really check and see if this thing is Rusty or not. You can put your own motor in it. I'm selling a 318 right now out of a truck running for $350. And that's proven running meaning they can come see it run inside the truck before I pull it out not me telling him it ran the last time I I seen it or it was running when I pulled it out. That would be considered a core and probably worth $100 or less..
