Weighing my options

The thing about a 360 it is not a typical Dodge motor meaning big bore small storke. if i could i would bore the 360 block out and insert a 318 crank and make a 340 but i don't know about the whole spacer bearing think. I talked to a machine shop and they said it would work fine. it's just my cousin has a 383 and offered to me and it just got me to thinking.