It takes a different manual valve in the valve body to do that, along with a couple of block off plates and body drilling..
Taking it's balls out and drilling holes is for more oil flow to apply bands and clutches faster.
The balls restrict fluid flow and make the fluid flow through a certain size hole to make the factory shifts comfortable, and then the ball moves from the bigger hole it blocks and lets the fluid come back quicker when things release.
The stage 3 Transgo kit makes it a full manual.
Check it out,
TransGo TF6, TF8, 904, and 727: TF-3
I got my stage 2 kit a lot cheaper on Ebay than anywhere else.
A local shop told me $325 and I laughed at them.
Got it on Ebay for 115
Here's what you want and it's in CA also.
TF-3 TRANSGO FULL MANUAL SHIFT KIT
Oh, and your Wife banging on the shifter checking it out is a VERY good sign.
Was she making engine sounds while she was doing it?
That's a better sign yet.
I gotta go put my newly painted beak back on.
I hate it when a part isn't on and I have to drive the car.