340 block or 360 block

I have my hands on a 69 340 block that is bored .030 over and a 76 360 block bored .030. I plan to stroke one of them to use in my 73 dart. What are the pro's vs con's of each? My gut says to use the 340 block. Is there anything the 340 block has to to have done that the 360 block doesnt?