I think that such a move will be counterproductive for two reasons.

You can give it a ,but you want a high ratio & H145's have ratios ranging from 3.9 [B110] down to 4.11 [B10] then to 4,375 [B20 & VB10] with an optional 4.625 [again B20 & VB10] but rotsa ruck ever finding one of those.


The transverse centerline of the H145 will [theoretically] be 2.5mm too far forward with a H145 diff in H150 housing install, & something that the diff gasket touches will need to be machined by that amount to get the so-called perfect alignment.