Scott,

Are you sure that the new stove is 220v? You don't say in your post
I'd read the installation manual carefully since the sales guy lead you
to believe that there is no neutral wire. I can imagine that the neutral and
ground are connected by a buss link but I can't imagine a stove without a
neutral in the US.
In the old days stoves used a neutral and 2 hot wires. with the ground
attached to the neutral.

Dave M.