overdrive

[Thomas_Mitchell@notes.amdahl.com]

HI, I have a 1966 MGB-GT and I have overdrive type D and transmission
coming to my house and I am
researching what it will take to install them.
I cannot find the vacuum switch and have been told that they only used in
on the early overdrives and then got rid of it.
I have been told that I really don't need it, can I get another source on
if this is indead true? I hate to go through all
this expense and mess up my new overdrive. Can anyone help?

Tom MItchell
1966 MGB-GT