That is what I thought too.

There is a couple reasons why you cannot,

1. anytime you log time under part 135 requres a 135 checkride of some sort, whether it be day vfr pic, sic on what not.

I have not done that

Just cause insurnce requires two pilots for their policy on the airplane, that is outside the scope of the FAA of required pilot definition. The King Air 90 does not requre a type, which is no shock or secret, and it is cert for single pilot IFR.

Very little leeway to log SIC, and I do not meet any of the requirements to log SIC.

More Questions, be happy to answer

Reeves