741 v 742 v 489 housings

I ran a 741 3.55 Sure Grip from Randys Ring and Pinion for ten years. We made hundreds of passes with about 440 HP. On MT ET Streets, I would dump the clutch at 4000 RPM in a 3700 pound car. You will have a hard time breaking it. Now what kind of shape the gears and bearings are in on the unit you are looking at is unknown, but for $50 its worth trying.