Considering it's not tested, and Dave at TEP is currently testing another option, I'd wait.
News,Updates
A long-time project in development is finally close to being available. We have been working for almost 2 years on determining the cause of chain failures on higher powered cars and did a lot of testing to prove theories and ideas to see what is going on. This led us to some new ideas on how to address the issue and now we have finalized parts and have several transmissions in motion for final testing of a strength upgrade. One of the vehicles for this is our own 97 Grand Prix that makes about 500whp and it will be getting a weak-legged 3.29 ratio 7/8" single chain set, well known to fail on much more than 400whp builds. We should have this car ready in the next month for further testing and updates will be made at that time.
Note- This item will not be for sale individually and will only be available as part of a rebuild. There is a lot of time involved with fitment and special machining that has to be done, it is by no means a simple bolt-in part.