help ordering borgeson shaft 75 k20

[75chev4x4]

Hey guys I would like to order a borgeson steering shaft for my 75 chevy k20. I tried this once before and ordered mine from summit with the one that they said would fit which was the 000933 and it fit at the firewall splined end but was a 30 spline at the box and my box is the 36 spline (correct for the truck) so no dice. I went on borgeson.com and it says that the 000932 is the correct shaft for my truck. Has anyone else with a 73-76 put this same unit in their truck? I just wanna make sure so I don't waste another $30 shipping back and forth and summit didn't care that they were wrong on the part so it will not be ordered through them. Thanks in advance.