Whats it worth ? 340

Since they were produced for only a short time, any rebuildable/savagable 340 *shortblock* is like gold. I haven't been in the market for a while but I'd guess it's worth at least $1000. The 360 heads don't add all that much value. The Edelbrock LD340 manifold has been out of production for some time, and is a good piece -- somewhat better than the OEM iron intake manifold. You didn't mention which "carbonator" you have.

Bryan

'68 340-S fishback
'69 340-S ragged-top