Time for an update.
I bought and installed the .82 a/r housing. I just drove it for the first time last night.
WOW, what a change. I was afraid the .82 might still be a little laggy for what I was looking for. But I can actually get a lot of boost from a roll in 1st! This is exactly what I was looking for. Transient response is also great. There's no waiting around 1000rpm to get full boost again. I know next time at the track I won't be running as hard and will fly by my old time.
I also threw in a twin disc to fix my lock out issues.
Review on a redesigned twin disc to come.