273 Crankshaft Quiz

gzig5 said
@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.

you dont need to add a bunch of weight weight to a 273 crank for 340 stuff, you need to REMOVE weight from the crank throws. Lighter aftermarket 340 pistons will fit on the plenty strong 273 rods. If you can get the stock 719 g 340 pistons aftermarket to 273-4 weight (569 g) your good to go.