It's kind of funny a year ago I posted the question about using a turbo 400 behind my big block and was told to stick with the 727 even by Monty.
GM Trannies explode too IF they are not built right or are abused. Any trans can be a time bomb if abused with the wrong parts.
Th400 main problem is tossing into nuetral across the stripe. Unless you have a valve body deigned to do it. 123n. I currently run one. Easy to build. BOP versions are cheap and plentiful. Personally I have always hated the 2-3 shift on 727's and tweaking the band.
The 2-3 shift is all about timing to avoid overlap and you can find the sweet spot by understanding the front clutch clearance, springs and the kickdown lever ratio and adjustment. The 4.2 lever is the best all around IMO, the rest comes from experience but a good 727 trans guy should know this.
