contax/yashica bayonet mount --> k mount ?

[Arnold Stark]

Hi everybody,

the prices are dropping for used Carl Zeiss lenses for Contax/Yashica 
bayonet mount. Some of these lenses do have no Pentax equivalents which 
makes them rather interesting to me, e.g. the Planars 100/f2 and 135/f2 
or the Distagons 18/f4, 35/f1.4. Thus I have one question: Can the mount 
of such Zeiss bayonet mount lens be modified in such a way that such 
lens can be applied to k-mount cameras like the LX (without using an 
adapter that increases the distance from lens to body)?

Any help wuld be appriciated!

Arnold