I am looking at a potentially risky connection in YVR and thought I would ask peoples' thoughts. It would be FRA-YVR-SFO as an LH/UA connection of just 1h21.

I looked up the MCT I/I for LH to UA, and it's 1h20 so this is a connection just one minute over MCT. However, I will be alone and I should be in either PE or J in the inbound (waitlisting a GPU), and have status and Global Entry (not sure if either of these matter). Also, if I miss the connection I'm guessing I would just end up on the later UA flight anyway.

Am I completely crazy to attempt this connection?