8 3/4 Help and Opinions?

I need some 8 ¾ rear help. I currently have a '741 case, 3.91 SG rear in my 69 cuda. It is currently a pretty hot 340, 4-speed but will eventually be a 416 stroker when I can afford a few more parts… This is a street car with street tires.

I am in need of a new driveshaft and started measuring. While measuring for the driveshaft, I found that this rear has the 7260 pinion yoke. Since I only want to buy one driveshaft regardless of engine, I was wondering if I should upgrade the rear yoke to a 7290 or 1350 size pinion yoke. What do you think? I know the 741 is the "weakest" case due to pinion size but looking ahead in case I ever break and go to a 742/489 case, I think I would need the 7290/1350 pinion yoke. Or would you just leave it alone and order a shaft with 7260 joints?

BIG QUESTION: In changing the pinion yoke on the 741 case, do I have to worry about messing up my pinion depth or can I just unbolt and bolt a new one in? I think the '741 has a solid sleeve and not a crush sleeve. Is this right?

I would appreciate any information and help. I would like to order my new shaft in the next couple of days….

Thanks,