http://www.gearhead-efi.com/Fuel-Inj...(94-95-Camaro)

Use a 1N914 diode and a 1k resistor. I have only tried the JY-MCU boards and they worked for me, but any FT232RL chip based board should work.

The only thing to note is that apparently there are some counterfeit FT232RL chips around that don't work with the official FTDI drivers. The JY-MCU ebay listing did state it was an original FT232RL chip.