61.55
Try 61.55, my copy of the regs show 61.58 as reserved.
.55 doesn't say anything about a written test or an engine failure after TO. Yes, you must do three tO and Lnds and engine out procedures and single engine amnuvering. Must be familiar with the aircraft, its systems, procedures, limitiations and performance. Also no requirement for an instructor.
But, and it is a big BUT, the insurance companies want to see FSI or Simuflite or Simcom. But some companies do have policies that permit ways around that.
The training will most likely be done with you in the right seat, as that is where you will sit during your normal duties. I have found no requirement for a pilot examiner to conduct the training. And have found no requirement for a 61.55 checkride.