Can a 318 crank and rods be used in a 340?

rlofaro said
Thank you all so much for your input and knowledge everyone. Just wanted to see if I can save some money on the engine build. I am using the Upper half of this 318 which is a nice Eldelbrock Carb and Manifold and M/T covers. I just like to have a nice sounding engine, with some balls when you punch it. Growing up in the 60's and 70's, these 340 dusters either automatics or Manuals really were pretty potent right out of the factory in my opinion.
Thanks Richie

It sounds like you will be happy with a 325-350-ish HP engine, and should be safe using the 318 crank.

Just as a comment for thought, if you use the lighter hyper pistons and lighter rods, you will end up taking off weight from the crank in the balance process and that is the cheap way to do it. That will be lighter on the parts and less stress if you do ever hammer on it. So that is one approach to consider.