3.55 SG Wanted

I appreciate your help but I know what the differences in cases are and I am aware of how the cases work and all of that. I am trying to get a 8 3/4 drop out with 3.55 gears and a SG. Somehow somewhere along the line people are becoming confused at the original posts purpose and what not.

I just figured you might wanted to replace you dad's with exactly what he had that's all. The 489 is the strongest of the three another words.