340 crank questions

I was just thinking of ideas. I think the cast crank340 is good only needing a polish. I have the other 2 cranks/rod combo's sitting around and thought about making a mini stroker out of the 340. I have a 73 Duster I was thinking about putting the 340 in instead of the already built, Eddy headed 5.2 magnum I have on the stand. I think the resale value will be greater with a 340 in it versus a 5.2. I could use the Eddy LA top end assembled on the magnum, on the 340 and use the 5.2 elsewhere.