I love the fact that people think that because they know the rules, no one else does. My mother in law works for vicroads, I am reminded most days of the rules and how my vehicles don't comply with them, this has been the case from the day I met my now wife's family. I will admit I am new to corollas, hence the question of gearbox choice, but my last car was a GQ patrol with a blown ls2 under the bonnet. I became very close with my engineer during that build as the person that I had initially start the builds workmanship wasn't as good as they made it out to be. In short the patrol was pretty much built twice, once by a supposed reputable workshop and then by me, before I could "legally" drive it. I'm not going to make that mistake again. I am looking for advice on gearbox choice, not advice on the rules. I tried to include as much info in my initial post so that I could get the most informed answers, but that obviously hasn't worked. Thanks though for the one proper reply to my question. I will look into the R154, I saw the tremec mentioned on a couple of hot rod pages, but I'm hoping not to mod the tunnel to much. If anyone else has any more productive opinions it would be greatly appreciated. Cheers guys