its true we need to run 50/50, we even built a trasfer case with a solid shaft so it dosn't have a clutchpack (very light weight) ,in testing car was very fast but front diff couldn't handle it. we punched the front diff assembly off the sump.
The problem is the front diff is small but if you run too much fwd under braking the load coming back into the front diff is opposing the load from the transfer case. the casting on the sump is the weakest link and because the front pinion and cownwheel
create a sideload (trying to spread apart)they punch the diff off. when you look at a broken one you can see they will take that load in the power delivery direction (on power pinion has thrust direction against sump) but they are not strong the other way. result was to limit how much fwd under brakes (no broken diffs since)
dave