67' 318 crank in a 69' 340

I appreciate everyone's time , thoughts and opinions !!! Correct me if I'm wrong but I think the KB167 piston is for a 318 bore , I will be using a 69' standard bore 340 so it looks like a KB243 piston will be needed and I'm certain the bob weight will be different than previously thought .

I am totally out of my element here and I wont pretend that i know what it takes to figuring out what is necessary to balance this short block but so far I can see me using the KB243 piston in the 69' 340 block with the 68' 318 crank/rods that I have . The cylinders looked to have been ridge reamed and walls deglazed ( cross hatching is quite visible ) . The current pistons in the 69' block are 72' factory pistons . The bores will need to be confirmed as whether they are straight or will need to be bored to straighten .

For me , this 70' Dart Swinger is just going to be used for cruising around , going to car shows and the occasional blast throught the four speed (mostly under 5500 rpm ) ... You know , the typical fun we have with our mopars !!

Thanks again to everyone who have taken the time to pass on your thoughts and opinions , very much appreciated !!!
Take care everyone !!