I think Carl's idea is most logical, get it going with another 44 and swap your parts into it, then build-up another stronger axle, I really like the idea of building the 9" with the true 9 third. That would give you an easily adaptive option (choose your gears, choose your locker, choose the bolt pattern and bolt it all together). The true 9 is pricey at about $1000 but the rest of the axle isn't going to be as much as a 60 would. If you went HP 60 you gotta first ocme up with the center section, then have it retubed, then have it geared and locked and then have the bolt pattern changed, deffinitely all doable but I think it would be as much or more than doing the 9".