82GT,
If you're getting the 89 b/c you want an 89 then go for it, but if you want the '89 just b/c you don't want to do a simple wiring job then I'd say DON'T DO IT!! If you have air conditioner setup in the 82 and you've changed your heater core b4, it's not much more work than that.
I would think it would be WAY more work to swap everything from the 82 to the 89 than to just rewire the 82!
It's not a GT or LX??
Then what the heck is it?? That's all they made in 89.
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'79 Mustang Coup w/ 4" Cowl
Stock 5.8L, C4 w/ shift kit
Holley 750 cfm, Edelbrock Performer RPM intake
1 5/8" MAC shorty headers, Al driveshaft
2.5" Off road H-pipe, 2-chamber Flowmasters
Front: 225/60/15, Rear: 255/60/15 Eagle GT II
Weld wheels (15x6;15x8), 8.8" Rear w/ 3.55s
14 x 4” K&N air filter (getting the Xtreme setup soon)
"Red, thou art my companion. Hasten now your quickened metamorphosis to Green that I may conquer all who dare abide there beside me. May they be left thither behind burnt black." ---Fox Body