depend what you want do, and what 1/2 cut you have..
If you have u13 / u12 / w10 / P10 SR20de (or det), than you need to source for SR18 B13 (or B14 version), get the timing chain side engine mount, and also the mount bracket (on the engine side). If can, all the mount..less hassle
Than you need to know what g.box you are using. Cable or Hydraulic, with or without LSD. than the drive shaft have to be custom made (if your 1/2 cut are u12, u13, p10, w10. If B13 or B14 SR18 g.box than no need)
lots more things you need to consider.. thats why you better go to SR transplant expert...
For stronger engine mount, i'll advice you to change it to PU mount.