I am replacing the clutch in my 98 cobra and I am going to replace the rear main seal while I am in there (130,000 miles). Should I get the teflon rear main seal or stick with the regular old rubber one. The teflon seal is supposed to be better for imperfections on the sealing surface but must be installed dry. Right now my rear main seal is not leaking so I don't think I would have any problems with any imperfections on the crankshaft. Also, is it ok to use RTV for the seal cover plate? Thanks in advance.