Use the $500 and upgrade to 35-spline stubs and some type of flanges or hubs. Also make sure you have at least the non-neckdown inners. I broke a necked down inner first and drove out in 3wd. That would not have been a fun trail fix because it required pulling the carrier out to get the broken piece out. I then broke stock 30-spline outers on two occassions. Fortunately these didn't take out the spindles also and I repaired them on the trail, but spending an hour in the mud swapping parts is not my idea of fun (no air tools, and had to disassemble the u-joint to swap in the new stub...a complete inner and outer shaft assembly would be much faster). I found a 3rd 30-spline stub twisted when swapping the pieces. This was with the skinny and rather short 13/38 TSL's and stock 6.2 diesel.
I have since gone to non-necked Spicer inners, Spicer u-joints, and Yukon 35-spline stubs and have ran much harder trails for years with 39.5 TSL's with no issues. 78Buford ran all Spicer stuff in his front D60 under a 7k truck with 42's and built big-block. He finally did break a stub but the spindle bearing was shot allowing it to groove it out, and then went all chromo.