340 Block Cost

IMHO, I would save the 340 block and pass it on to a restoration type guy.
Then find a 360 block for much less and build your stoker based on that for less money in the long run.
By stroking it and changing the pistons, heads, etc., it's not a ''magical'' 340 anymore for that matter.
And your right foot won't care either at that point as well.....