About a pound a 741 case has a 1.50 pinion diameter. the 742 case has a 1.750 straight diameter and the 489 case has a 1.875 tapered pinion. All three will interchange but some combo gear sets wont. Aint that right Charlie. Thanks Ron Parker

thanks ron,

i'm pretty sure the 741 would do just fine for me

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My Dart
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It's not rocket science, we're just splitting atoms.

Carrigan,

Even though I swapped to a 489 case to get Sure Grip, the 741 pig is a fine piece of work. Mine was in a truck that worked hard and was torquing the 741 against some serious loads at times. Only reason (well ego played a part too) I swapped was I built a seriously improved motor and am toying with the idea of using a blower on it. In a car, even with a improved engine, a 741 should do well. I like the 741 so much I kept my pig for good luck. Be SURE you put in the mopar sure grip lube once when you swap.
rock
64d100

thanks guys...
that was exactly what i was thinking...there is no blower in this slants future

_________________
My Dart
GO VOLS!
It's not rocket science, we're just splitting atoms.