I haven't been around one for a long time, but I would be willing to bet they are 12pt, not torx.  Case used lots of 12pt bolts.

Parts book lists 12 point bolts in the oil pan, #9:

http://partstore.caseih.com/us/ValleyImplementNL/parts-search.html#epc::mr63979ar317933 

Beyond that I am no help.