The mount is long enough that the torque it the ends is minimal. With the plate on the inside, the chance of it tearing out or bending the floor board is very low.
The flywheels that are used with this type of clutch are extremely light.
The lack of inertial mass from the flywheel would make it almost unusable on the street. Its do-able but I bet you would not like it.
A sequential system, if I recall, uses the first turbo to spin the second. This allows incredible boost pressures. I don't know of any gasoline engines using this setup. Detonation is the big problem. Diesels use this system to push 60+ lbs of boost. Tractor pull engines! Correct me please if this is being done on gas engines!
Make sure drums are adjusted properly. Make sure the booster push rod has a bit of play before contacting the master.( a few thou a least). Make sure brakes a completely free of air.
Mongo
Dan Halls Six Point Automotive is the only place I will have my machine work done. I have used him for 35 years.
He has done all the work on my race engines and they always run well. He is on NW Alberta or Killingsworth. I don't remember at the moment.
Mongo