A problem to be solved before going further with the Powerglide Gear Vendors combo, the GV shifts electronically, the glide mechanically. Apparently it's possible to convert the glide's valve body to electronic shift but the US supplier won't talk to me, it should not be that difficult though if I can get hold of the right bloke here, need engine braking too. If that can be done then the next thing is to get a electronic setup for driver controlled shifts, probably going to go with a paddle shift arrangement rather than a floor bump shift like the 280ZX has. Have found a promising device that is primarily for driver controlled shifting rather than the usual more expensive devices which are multifunctional.
All the above is so that shifting is made to be as simple as possible with an OE type mechanical shifter on the floor for PNR only. All this to save 50kg and reduce parasitic loss but if it all works properly then it's going to be a damn good setup for circuit racing.