I can't seem to find it either, but I know it was discussed before jza70 vs ma70 swaybar. I do remember the JZA70 sway bar being an upgrade and I'm wondering what the numbers are. I know whether is was hollow or not was discussed, and the diameters as well. Does anyone have these numbers. I'm going to try and do another few searches, different words and see if I find it and post the link.
My car is an 87 so it sounds like it would be ab upgrade for me by the info posted already.
Concerning the diff I hear that it's only weakpoint is hard launches from a standstill, otherwise it perfroms well. Does anyone have anything to add to this. This is the general consensus from my research. I can't say for myself since I haven't driven one, but I want to get one.
EDIT:
http://www.supramania.com/forums/showthread.php?t=43289
According to the link the rear JZA70 TT/JZA70 TT-R/MA70 Turbo A and shocking to me, GA70 TT are all the same. It doesn't include 'regular' MA70's which includes the solid bar 91/92's. From this I would say the Rear JZA70 sway bar is different, I can't say whether it's better or not. It's either solid, larger diameter, or both. I assume it would be an upgrade, why else would they change to this in the newer models only to downgrade? But in the end....it depends on your suspension setup.
To answer your thread title, yes.
I would like to know a bit more about the front JZA70 sway bars, so far all I can guess is that it is the same 91/92 USDM ones. If this is the case, I could get a US version much cheaper than I could get a JZ version. As for the diff, I will dig back into the archives and find my own answer on whether I should get one or not.