How To Swap Throttle Body?

[totiturbo 3]

HOW DOES ONE GO ABOUT SWAPIN' AN 89 T.B.I-TO A 91 TSI.. BOTH TSI'S,,??
THE 91 HAS 4 VACUUMS ON TOP, THE 89 HAS THREE OR SO. PLUS THE ISC PLUG (IS JUST THAT) A PLUG , NO LONG WIRE TO THE FIREWALL PLUG-IN, ?????

 

[Mike1992]

the 89-90 is the odd year you cant use it on a 91-94