Mechta,
The wing provided the vast majority of all lift on the 330/360 design. There was a small component of lift from the fuselage but it was negligible. In fact there was probably more lift from the spars which were of an aerofoil design. The wing was a super-critical aerofoil design. Wrt to de-icing, procedures were to deice the wing and fuselage.
Yes it was ugly, but it was a darn fun plane to fly.
Jenson