i have a 90 tll and i was wondering if i can put 93 upper and lower intake manifold s on it what othere changes i will have to do please help give list of parts if possible

 

You cannot put an FD LIM on an FC 13BT. The angle of the ports is completely different. You can mate the FD LIM to an S5 (not S4) LIM, but it's quite a lot of work for not much gain (other than aesthetic). Search for the many threads on doing this.