[james schaechter]

In a small block stocker Most wide gear versions will do. Keep in mind that there are some early models still in service that have "narrow" gears and some other differences that might not stand out to someone not familar with them. The biggest problem with the narrow gear trans with a small block stocker is not breakage, but the fact that Jerico may not have replacement gears anymore for them. Some of the early wide gear transmissions also have a narrow snap ring on the input shaft that can pop off and cause some carnage. I would stay away from these early models if you plan on racing with one.
That being said their have been really good dr4s out there for probably 15 years or more that have the wide gears and thick snap ring. They work great. I have raced these for many years and have never had a new one.I have had 7 or 8 different ones. I always start my research on any used ones by calling Jerico and giving them the number stamped on the case. They are very good at telling you the type of trans it started out as. A lot could change since it left Jerico, but at least you know if it was a narrow or wide gear and what snap ring and bearing size it has. I think those are critical items.

If you run a SSer or a Big Block car with one, I would certainly encourage one to usea wide gear big front bearing model with the top loader case at least. It is 3 lbs heaver, but probably worth it. DR4-4 is cool, but I don't know if it is necessary for most applications.

Of course, the soft clutch is a must with any of this.