well, any hoots the bother you will have is
-a 993 has a hat size of 72mm
-a 944 is 75
-so you are 3mm short for starters
-plus, the 993 disc is 305
-the other 299
-so there 3mm that may toch the caliper there
refernce here
http://www.volkszone.com/VZi/showthread.php?t=343584