The good news is that since the gto and f body use the same tailhousing you. This is tremecs web page for the transmission t 56 magnum this is an image off the tremec site of a regular t 56 magnum.
Bk7 Tr 6060 T56 Magnum Carbon Fiber Synchro Kit
T56 vs t56 magnum. Notice the magnums 4th gear is equivalent to the supra 5th gear. Page 1 of 2 1 2 next jun 17 2012 1. I would only go tko 600 if cost was a factor wanted to run old school linkage and didnt really drive on the free way. Chances50 new member established member. All input shafts on the magnums are 26 spline. The magnum also shifts better than the tko does.
Compared to the torque curve of a 2jz with a big single turbo i would assume the t56 magnum would handle it quite well. Tremecs aftermarket upgrade for the t56 the magnum essentially a tr6060 is about 15 inch longer than an f body. The tko also handles 600ftlbs vs the 700ftlbs of the magnum. Here is a comparison of the t56 magnum gearing vs the toyota supra getrag v160. Anywhere from 400 430 would mate up perfectly to this transmission. T56 magnum is rated at around 700ftlbs and has been proven behind v8s which put out lots of torque.
Tko600 vs t56 magnum discussion in road side pub started by chances50 jun 17 2012. Feb 19 2009 location. The original t 56 transmission has been superseded by the current t 56 magnum that offers all the original t 56 features plus the 700 ftlb torque rating. Cd009 i have seen some running 1200whp through it but there is no official number on torque rating for this gearbox. As you can see the t56magnum gearing is a good bit lower than the v160 so to get v160 style gearing requires a higher rear gear. The most notable difference between the input shaft used in the t 56 and the tr 6060 and magnum is the bearing hardware which is much larger in the tr 6060 and magnum.
The magnum is shown at left and the t 56 is on the right.