727 line pressure question

Last time I adjusted bands I looked things over and I think the VB has a mild shift kit. The VB has the slot filed for the manual valve oiling in Park. Plug with the small orifice installed for the 2-3 shift overlap. The line pressure spring appears to be OEM.
Partial throttle kick down works fine. Shift is firm, does not bang. Same gears 3.23
I'll drive it today and write down shift points for light, medium, and WOT
Good tip on installing a plug. Hopefully my angle drill will be able to get there.

I assume I would need to get a shift kit for new shift springs?