Well, Mother Mopar used the 741 behind Max Wedges and Race Hemis in 64 so they seemed to hold up pretty good. Selection of gearing could be an issue! If you planning on putting a decent amount of power through it, then I’d maybe be on the lookout for a 742 Sure Grip since the SG can easily be rebuilt with new clutches unline the 489 which will require special maching of the cones. Just my opinion.
