My son has an R34 gt auto. I'm looking at methods on how to tune it with the view to be able to further tune it down the track when he is off his P,a and can go turbo. The issue is the 98 gt auto has a seperate TCM and is not compatible with swapping out a gtt auto nistuned pcm ( from what I have read so far ) Please if anyone has info on what to do here I would much appreciate. Realise that some options include manual swap, manualised valve body. Just hoping there is a more direct running option I haven't been able to find. Thanks in advance.