if the 60 is from a gm pickup then it wil be a powr-lok, the smaller and lighter SUV's and such got the trak-lok units
if you weld an axle solid then you will risk breaking a number of things such as shafts, spiders, etc, if you drive on pavement, and not on at least gravel and preefrably sand, mud, etc,. every turn that you take with a rig on pavement with a welded or spooled or mini spooled axle will have a risk of breaking something in the axle and also of losing control of vehicle because the inside tire of the turn will be spinning
good luck