when you say "silvertop" that usually refers to 20 valve engines, but you say yours is a 4agze?
Is it 20 valve silvertop, or is it a supercharged 4agze?
The gze AFM models came out mostly with an e52 - 474 which is a non-lsd box. Any gearbox with "E52 - xxx" will be a straight bolt in replacement...
The later model ae101 4agze E58 LSD Gearbox will also work, but you need to modify the rear engine mount.