i want to swap my dx guages with si guags, what kind of modifications do i need to do

 

wait for a second opinion but, i believe it's plug and play. even the tach!

 

yes it is plug an play...if you have a 88-89 you need the 88-89 cluster
same goes for 90-91

if you have a 88-89 and want to go with a 90-91 cluster you need the cluster bezel also..and then you have to extend the hazard wires to meet the 90-91's hazard button on the right side of the bezel.

 

like the other dude said...depends on what year you have...find those years 88-89 is different than 90-91...and pretty much plug and play from there