Made some progress that felt
very rewarding this morning. Removed all exhaust components without breaking one stud (although a few came out with their respective allen nuts). The tools for this job were a bit cobbled together:
I had to use a cutoff tool to remove the tip off of my rounded 8mm allen T-handled tool to get proper purchase on the left-side of the motor's allen nuts. The previous a-hole who worked on this motor had managed to not get the studs far enough in to the motor and therefor limit the amount of useable hex. Finally with a torch and a wrench on the allen key I was able to torque them loose.
End of day the bottom of the motor was exposed:
Ready for the next few steps..