what do I have

[Shaggy]

The tranny is more than likely a 24 spline C-4 with the green dot vavle body. At least that was the most common back then. To my knowledge there is no ford 2 speed for passenger cars. What makes you think it is a 2 speed if it is the shift detents then that would just confirm the green dot valve body. I hate that valve body but I have met a few people that liked it(the shift pattern for it is PRND2 there is no provision to manually put it in and hold 1st gear). Last but not least the driveshaft is not anything special it is just a driveshaft annd any of the yolks from any of the small block trannys but a C-6 will fit it and overall length is the same as a 68 small block and C-4 combo.