The statement by SST is that the springs in the valve body that setup the governor shift pressure points are all different for the diesel and swapping into the gasser will result in the vehicle shifting way too early.

Whether this can easily be corrected with a simple Bowden cable stretch is the question.

I'm still hopeful that the simple modification of removing the spring from the governor boost pressure valve will result in a FGS.

Eric still has plans to send the valve body from the 300SEL to SST to perform a test on that theory using the dyno as SST.