slant 6 oil filter REMOVAL

I am trying to remove the oil filter on my recently purchased 64 dart, and either I am turning it the wrong way, or it is on there WAY too tight. Did Chrysler have another reverse thread thing there? Any tips on getting this off, right now I've got a filter wrench on it, and am thinking about adding the pipe for more leverage. Any advise would be appreciated, thanks Mike Stillwater,MN