8 3/4 with 3:55 posi

In the next few weeks I'll be swapping out my 742 pig with posi 3:55 gears for a new 489 one. I want new parts for my gen 3 power house pushing it. The pig has been in the car for 20yrs now. Just serviced it with new fluids when I installed Wilwood discs on back. This time I had to add 10ps of FM to her as it was making the clicking sound on tight turns. Guess it did not like the new gear oil. Lol. I don't believe there is anything wron with her as I drive it now and had the car up to 110 to see how the new motor reacted. No noise. Just being honest.pm me if your interested.