Hey Plantman,
I think I remember somebody posting that the Bowden Cable is 'backwards' on the SDL from the SD, in that a 'tighter' cable makes the trans shift later, not sooner.
Have you tried any adjustments to the cable to see if that's what you need?
My transmssion is original, and shifts a bit soft at any throttle position. I think the Previous Owner wanted a smoother shift and someone dropped the shift pressure, since I can't get a really firm 1-2 shift even if I disconnect the vacuum line. One more thing to play with some day, it's OK for now.
My goal is to the moon and back, which is 238,832 x 2 = 477,664.
It's a goal, not a quest...
Best Regards,
Jim