I'm subscribing to this thread. I currently own a SC400 and I can verify that all suspension components are shared with a MKIV Supra. Supra 4 pot brakes are direct bolt-on (what I'm using right now). This will open a lot of possible swaps also 1jz, 2jz, 1uz all bolt on to that subframe easily. I cant wait to do this mod by doing this, I get better suspension geometry (double A arm vs strut type, you can easily install coilovers, you can install better brakes and beefier sway (stock sway bars are actually quite beefy on supras and sc300/400's).