Does anyone know where I can get a Accel Gen 7 Harness adapter to adapt to my 1990 IROC factory harness?

 

http://whiteracing.com/faq.html

 

I have heard of people having some issues with the adapter harnesses. I ended up making my own for my setup. After doing some research I found that each injector needed to have its own dedicated wires, mainly the grounds. It looked like the adapter harnesses used only 3 wires just like the stock configuration 1) 12v key 2) right side ground 3) left side ground
If you are decent at wiring I would reccomend sitting down and making your own. Just my

 

How you make the all the dash gauges work with the DFI with the new harnnes?

 

If I'm not mistaken most of the guages are not tied to the ECM. the fuel level, volts, oil pressure, and coolant temp are all independent of the ECM the oil pressure may be tied into the fuel pump circuit as a safety feature but I think that is about it. The tach can be connected pretty much like stock. The only problem you may have is with the speedo. I run a 4L60E transmission and it uses its own ecm which had an output I could use for my speedometer.