1/8 Plexi???

I researched this a little and found out that the stock shafts will work, you just have to get drive cups for the tranny. But if you don't place the tranny just right it wouldn't work. Even getting it right, I still found it to be a be a tight fit. I did grind down one end of the shafts for a little play and had to order some drive cups for the tranny. Hope they fit?