Steering column for 73 blazer

[Jdog44]

My sons 73 blazer needs a colomn what years will fit in a 73 blazer. My brother gave me two that he had laying around one tilt and one not. The non tilt looks like it will bolt right in. The tilt looks like it will bolt in but the part that bolts to the [rag joint bar]? is splined and the one i have is square shaped . I also have a tilt out of a mid 80 chevy that looks right except the shift mechanism looks like it is on the wrong side. thanks for any info