Hi Keith,
great work, i have the same setup and thought about how to mount them.
These are just my thoughts , no personal experience:
generally GT40´s are known to have a tendency to understeer going into the turn.
Following the theory one would need a stiffer roll bar at the rear to load the rear tires more unevenly in order to provide less grip there and load the front tires more evenly to increase the grip there. I don´t know the length of your rear sway bar arms, but with the front sway bar mounted inside the chassis , the shortened sway bar arms and the bigger diameter of the bar itself, it seems likey that the front sway bar setup is much stiffer than the rear one. Have you done any calculation on that ?
I for my self decided to mount the front bar outside the chassis like Dean has done it and try to keep the maximum arm lenght both rear and front.
As said just the result of my thoughts, i´m shure there are more experienced ones that can chime in. So Dean, Ron McCall; Ron Earp; and any other one racing Gt40´s and using sway bars could you share your experience ( may be in the suspension section of this forum, to avoid a thread drift here)
Thanks
TOM