65 barracuda trunion driveshaft conversion

Does anyone have the correct part numbers to take to a driveshaft shop for the conversion? The early valiant barracuda site shows this:

Here are the Spicer part numbers
for the B&T conversion.
Flange2-2-349
U-joint5-153x
Slip yoke2-3-800kx
Spline2-40-1711
Tube2 1/2 dia / .083 wall

The problem is NOBODY has any idea what a 2-3-800kx slip yoke is. Do you think it should be 2-3-8001kx?

Thank you.