What is the viscosity of the CV joint grease you propose to use?

CV joint grease is often manufactured to NLGI Grade 1 ( this one is NLGI 1.5 ).

The original/recommended self-leveling grease for a steering box is/was grade 00.

Corn head grease is grade 0 (supposedly also self-levelling, but a little thicker than 00).

https://en.wikipedia.org/wiki/NLGI_consistency_number