Driveshaft support bearing conversion

[crakarjax]

So, I have the donut style bearing and it's toast, I'd like to switch to the horseshoe style. I know that I'd need a new driveshaft if I were to use the front/bottom-mount horseshoe. However, I have seen rear/top mount horseshoe bearings as well. This post has pics of the horseshoe mount. CPP also sells a conversion mount as seen here.

Question -- If I use the stock style rearward mount, will that place the support bearing in the correct location (as I'm assuming the CPP mount does)? The stock mount just seems beefier to me than the dangler.

And while I am here, would a 5" drop in the future be negatively impacted by this?