[Healeys] Add overdrive

[Taylor, Todd S]

I have two BN6 tranny's and I plan on making one good tranny out of
both, but I've never rebuild one of these 
before.  Any info. on taking one apart??   Source for parts when I need
them,    big learning curve for me.
I hope the list can help when the time comes.

What usually needs replacing??

I know one of them needs a new first gear....  Also doesn't stay in
first gear unless you hold it in..
Not sure the condition of either from that, one with the broken first
gear came out of my car..