r-33 gtst 5 speed not R tranny is the best tranny for a Z with rb26,,, unless your talking r-34 dont think the gtr came with a 6 speed ....it will with stand 600+hp no problem. if you use the engine mounts i used and the tranny the front half of the drive shaft from the r33 gtst will bolt right in!!!! all you have to fab is tranny mounts