318 crank into 340? pitfalls

belmateo said
If the 318 crank came from a truck motor, it should be forged.

Food for thought:
crank coming from a truck engine does not instantly mean it is forged, I tore down a 318 that came out of a D600 truck, 1971, was a cast crank, not that I cared, just say'in....year (earlier) is more important than source