[Hozer 88GTConv]

88Workcar,
The tweecer website says there is a dedicated yahoo chatroom for tweecer users who discuss and trade programs for various applications. I'm sure you could go there and get some idea/feedback on the viability of the unit.
Like I said, the price is around $500 plus widebands and that is just for the basic unit. The data logger option sounds like the best to me, but I am just beginning to investigate this too. It sounds expensive though, but what isn't in this hobby?

"Calibration data includes:
Engine displacement
Injector size
MAF function
Base / Stabilized / startup fuel mixture
Base / Altitude / Limp mode timing tables
94/95 AOD-E shift points, TV Pressure, etc
Drive & Neutral idle rpm
Neutral & in gear rev limits
This is just a brief sample of the data locations which may be modified.

Do you have a custom chip, why start from scratch, you pay shipping to and from us and we will read it and send it back to you. Free! Just flash the bin file to your TwEECer and you have a good solid starting point and a calibration you know is safe, now start modifying that file and save it to one of the other 3 calibration locations you have available"

WARNING:
YOU MUST HAVE KNOWLEDGE AND UNDERSTANDING OF CHANGING EEC PARAMETERS OR YOU MAY NEGATIVELY AFFECT YOUR CAR’S PERFORMANCE!

TwEECer RT
- Real Time data logging, viewing and playback
- includes CalEdit, CalCon & cables.
$550 + $11 shipping
Texas Residents must pay sales tax

I think as soon as I find a wideband 02, I 'm doing it!!!
Look at the dyno pulls on the website...interesting stuff.