www.atsracing.com is an MR2 shop and they have an adaptor for GM sensors that might work for mitsu stuff, so that's why I was on that train.
From a tuning standpoint, what would one rather have - a high voltage reading or low? I know that if the signal gets too hot it can just max out and you'd never know, but too low and it's harder to tell if something is happening, right?