what would be best for my 89 mustang gt

I'm wondering what to upgrade next. Here's what I've done so far... BBK Cold air Induction System ,70mm bbk throttle body, bbk underdrive pulleys,msd 8.5mm plug wires, ngk iridium ix spark plugs, accel coil, MSD Ignition Cap & Rotor Any suggestions? Thanks, Michael.  

You don't mention them, but if you haven't added gears by now, that should be your next modification. If you drive your Mustang on the street a lot, especially the highway, go with a 3.73 gear. If the car is your weekend ride, go with a 4.10. After the gears, it's time for a heads, cam, intake package.  
Michael Johnson
Associate Editor
5.0 Mustang and Super Fords

thanks man but what about a Electric Fan is that good too or no  

I am not a big believer in electric fans, but that's just a personal preference. All my Fox-body cars had stock fans and fan clutches. If you have your heart set on an electric fan, do your research before you make a decision. My '94 Cobra came with an electric fan, and I'm battling that thing right now. I also installed an electric fan on one of my past Fox-bodies, and when the thing would cycle on it about shut off the car. It was a huge electrical draw. I know there are good electric fans out there, but do your research before pulling the trigger. Good luck.  
Michael Johnson
Associate Editor
5.0 Mustang and Super Fords

go with a mark viii fan with a dccontroler it will keep you car cool anywhere. dont waste your time with anything blackmagic.  
92 strawberry notch powered by MS1 V3.

Gears (3.73 here), heavy duty clutch (I use a Cobra), sub frame connectors, South side traction bars, drive shaft loop...endless modifications bro.