489 vs. 741

Hey guys , another rear end question.
Can I take my 741 suregrip and put it in a 489 case? I'm worried about the 741 if the car gos to the track. With a slick on the car I have heard bad things about the smaller pinion/yoke with no wheel spin. I just picked up a 489/323 open that I thought I was going to sell..........not sure now.