390 vs 408 - the real difference?

Good for you! There are many parts of the world where you wont find a 360. South america and australia come to mind.

318's were the answere for chrysler everywhere but north america,lol.

I've always liked the teen..

360s are available in Australia, but they were a fairly limited run, so decent blocks are hard to come by.

Figure on between $400 and $1100 for a 60 block at current prices down here. And thats for a block - not a long engine.

As for 340s...well they're as rare as Rocking Horse "skidoo"..........total local production run was around 300 340 cars.