Factory vs Van tilt for a 67-72 chevy truck

[70Chevy4x4Nut]

Can anyone shed some light on how to tell the difference between a converted van tilt and a factory truck tilt for the 67-72 trucks. I am looking at two tilts on ebay. One has a curved electrical plug the other has a straight plug, and the guy says he has the adapter for it. I saw an adapter that was flat to curved and was advertised as a must for a van tilt conversion. How would someone know what he is getting? Both tilts on ebay advertise as true truck tilts. I have two columns in my garage, both non-tilt. The manual shift has a curved plug right out of the column. The automatic one I took off of a 72 blazer has a flat blade coming out with the adapter that converts it over to a curved. I am corn-fused.

Thanks