904 transmission shifting adjustments

i found this thread where it talks about tying the kd lever back (says it actually doesn't act as a kick down lever any more, it adjusts how it shifts)

How to Install a TransGo TF-3 Manual Valve Body Kit in a A-904

I have 4 different books on this transmission and none of them are very helpfull when it comes to manual valve bodies. I think my biggest issue is im not sure what the previous owner put in there nor do i have any paper work or directions on the valve body, and im guessing he got the valve body for GER thunderbolt, which is no longer in business so i dont think i could get paper work.

If i pull the pan will i be able to identify which valve body i have? If i can find out what i have and get some literature on it, i think i could make some adjustments, or decide if i truly need this kick down linkage.

One guy said he hooked the lever up to a adjustable cable so he could make adjustments on the fly.

This would make sense, because the previous owner had it tied forward, and when you really got on it, it seemed like it would slip, and you would have to get off the throttle and then it would engage...now that i have it tied toward the rear i get a solid shift while staying on the throttle.