In the past, when using a high sulfur content material, a heavy bead is recommended when using a 309LHS. The typically ferrite content of the 309 is around 12-18 FN, which helps counteract the hot cracking. The likelyhood of cracks will be there for the high sulfur, but it can be overcome. Slow your cooling rate down as much as possible and you should have success. GMAW and SMAW have been the 2 processes that have shown to be the most successful. Good luck.
Chuck