Just wanted to update if anyone stumbles across this thread. DO NOT use hollow aftermarket u joints. I took a chance and snapped the u joint which snapped the axle yoke in less that 20 miles crawling at less than 5 miles an hour. Luckily I was able to crawl to the road.
quote from the suzuki forum
The u-joint to use is made by POWERTRAIN INDUSTRIES #9951-22....It is a perfect fit and is a peened type ( I just tack weld a washer on the outside to hold it in)
The next best is GMB #220-0045
Both are as good as the OEM.....only difference is that the 9951-22 has cap diameter of .790 which is a real good fit.....the GMB is .787 , not quiet as tight of fit, but works well
Both are made just like the OEM with a drawn cap ( much thinner to allow for a larger diameter shaft) and larger SOLID shafts