Schumacher mount question

[unclepunchy]

Gentlemen, I think I know the answer but wanted to double check with folks that have already done this.
My question is, do I do the recommended changes Schumacher says to just the Drivers side K-frame or both Driver and Passenger? Photo below.

 

[Bobzilla]

Should be left side only, if that is 73 and later slant 6 to v8. The left side was tall for the slant 6 and you are cutting it down and drilling to a more useable location. I don't recall any modification to the passenger side when I did mine.
I did 73 and later slant 6 to B/RB, but now I put in a small block 360 without having to alter the previous modification, just using the different mount kit.

 

[MidnightSwinger]

Yep, mod the drivers side only.