As mentioned, I have TOGs installed on my 95 L36.
I was able to bend the stock dip stick out of the way pretty easily.
You'll need to trim the front trans mount where I circled in the pic below. It just takes a minute with a cut off wheel. Other headers require you to remove the mount and come up with your own custom solution.
And you'll need to weld an O2 sensor in on the opposite side since the original location puts the sensor into the p/* rack lines. I just had the shop that welded in my DP but the O2 bung in there for pretty much nothing.
The front header flange is close the trans connector but you can clock it out of the way. I've never had an issue.
And I think I removed the heat shield on the rack.
All in all not too hard to install and I've been leak free for 4 years.
Edit- I have a flexible lokar trans dip-stick for a rwd gm car. I got it to replace the one that got pinched in my last car. (totaled the car) I forget what car it'* from though. I'll have to search around for it.