They were NOT changed in 67. Is that what you meant to say?
A 340 crank is not weighted (bob weights) the same as a 273, even though both engines "could" be neutral balanced (I did the opposite, decades ago...put a 273 crank in a 340)
@67Dart273
If you don't mind, could you go through what it took to run a 273 crank in a 340? I've got a 340 block without a crank and I also have a 273 Commando short block with the crank, rod, pistons that I'm not likely to use. Was thinking that I might use the 273 crank in the 340 with some light pistons, but I really have no idea what I'd be getting myself into. We can move to PM or a new thread but I'm sure others may be interested.
