K20 cab mount bracing with rotted cab mounts

[Rg500gamma]

I will need to install the braces to keep the integrity of the cab square before I remove it from the frame. Should I use the door hinges to the floor and the b pillar door lock to the floor as my reference and then left to right frame brace with a level on it to ensure it is square so I can pull it off the frame and leave at that to do the floor replacement ?
Love to hear what other methods have been used.

[Roostre]

I'm in the process of replacing my entire floor right now. You can read about it in my thread. Below is a picture of my bracing. I went from inner door frame to inner door frame on both doors and then tied those braces together. I did that so I could put the doors back on and test fit with the braces still in place. I don't have it done yet, so I can't speak to the success of this bracing, but it doesn't appear to have moved.

[Fbks_Cruiser]

Search for member May70. He has a good YouTube series on this very thing.

https://youtu.be/5ysUL5ZKtFk?si=cIyP5zaHPyo02TQ5