My friend uses the SDS EM-4F in her turbocharged 97 Golf, that puts down 220WHP at 11psi. It's really easy to program with just a wideband, you (or whoever's going to be doing the programming), and a driver. A day of 3rd gear runs, and all the fuel curves, timing curves, and boost programming was done. Again, if you can follow an instruction manual, this thing is really easy to program.
For our cars, we'd need the EM-6F which comes with the module, all the wiring you'd need, coolant and air charge sensors, the 6 cyl DIS module (from GM <_< ), and the programming box. Get the one with the backlight, trust me on this.
If you wish to keep your distributor, and not convert to DIS, then you'd get the EM-6E instead. She (my friend with the Golf) got the EM-4F, and tossed her distributor. Distributors are ugly, anyway.
The only bonus, tho, is that you don't have to fabricate the crank sensor mounting, which is a PITA if you don't follow the instructions C-A-R-E-F-U-L-L-Y!!
Their tech support is uber friendly, however, so if you get stuck along the way, they're really helpful to get you moving again!
Oh, and to clear up any misconception:
This is not something like a TwEECer or a SC Tuner. This system is meant to
replace the Ford EEC. That's your engine computer, btw, so for those of us with electronically controlled transmissions (which is all of us, minus MT-5 and SHO folk), would have to figure a way for the transmission control to work in parallel with the SDS.