relocate and change ignition switch

Hi!

I have a kz750 1981 ltd and i want to relocate my ignition switch under the tank but the stock one is very big because is build-in steering lock.
Do you know if i can change my ignition switch for this one without steering lock?

I have this one
www.z1enterprises.com/detail.aspx?ID=374
and i want this one
www.z1enterprises.com/detail.aspx?ID=369

Thanks!
Phil