Lot's of people have been sending me PMs about going to a 727.
-Don't do it you drive on the street very much. As little as I drive mine on the street, it sucks on any street over 45 mph with 4.56 gears.
-If you do go to a 727, even if it's strip only, keep the 3.92 gears, maybe 4.10s.
- The one thing I keep forgetting to tell everyone is don't get a reverse manual valve body. You can't just drop it into neutral if there's a problem, or coast to a stop to take a plug reading.