Quote: 340 was always a 4 barrel. 360 2 barrel had a much larger Holley 2 barrel than the small 2 barrel that the 318/273 had. 340 only available in A bodies 68/73 or E bodies 70/73.
340s were also available in B-bodies.
Getting the info off the block is a good start but other parts do get mixed in over the years. I had a '71 340 Demon that had a 318 block swapped into it under the 340 top end. I also got a 340 engine out of an A100 van (not original of course). You gotta look.
