727 46RH conversion coming

Hi guys,
I've decided to do it this fall and have a rebuilt A518/46RH to replace my 727 with. Going in a 1967 Dart. I've done lots of research and will start a thread and try to do a good documentation on it when I get there.
I'll have some questions for the smart tranny guys.
My first one is are the 67/68 single pole 727 neutral safety switches a direct swap with the 46RH 3 pole switch? or will I have to change the rooster comb? The reverse switch is located in the console shifter in this car.

Also can a valve body be removed while the transmission is standing on its end, tc end down on the bell, without losing anything or creating any issues or is it not recommended?

Single an 3 pole switches are not interchangable, but you might consider a neutral switch also in the console.
I think it would be a lot simpler than changing the trans stuff.

The valve body check balls are between the layers of the valve body and will not fall out from taking the VB off.
The only loose thing when you pull the VB is the accumulator spring and it's real obvious.
Yes you can pull the VB in any orientation without loosing anything.