Received and installed my headers last week. I have a Samberg engine/trans mount and t56. I was replacing stainless works headers. Quality of the headers was excellent and fitment was good too. The headers ended up having contact with the steering shaft which required me to grind off a small portion, but otherwise no issues. Oil filter/Starter were off to remove the stainless works headers so I'm not sure if they need to be removed to install these.
For what it's worth, I re-used a previous exhaust as a temporary solution until I can make something nicer. That exhaust section was for a JTR 1 3/4 header setup and required minimal modification to make work with these headers.