Usual chambered body with the Imola...mine weighs seven and a half pounds, if I'm not mistaken.Is the internal construction much different on these that the Ampeg originals? On those, the hollow area was pretty negligible (essentially the controls - similar to that on a t-bird but front routed vs rear - and a small corresponding area on the E string side) - not much more than a "smuggler" Tele.
Never played an Ampeg but I've tried the Eastwood copy...didn't like it enough to buy.