Thermostat Gasket: I found one on the net but you can't order it seperately. It comes with a Mr. Gasket water neck assembly for a 79 Mustang.
Mr. Gasket brand | Part #: 9713
The opening in the hole is 2 1/4". All the other ones going with the Ford F150 has a smaller hole which interferes with the thermostat flange. So for this I'm just going to use the Permatex gasket maker.
Water Pump Gaskets (on both sides of the backing plates): The ones Roush are sending me were sent unfortunately by snail mail and I don't want to wait 2 weeks to get them. I've been to 5-6 parts stores and they all have the same configuration as the one at the Ford dealer and they don't fit this water pump.
I'm now thinking of using the Permatex for both sides of the backing plates. Are there any real good reasons why I shouldn't do this or should the Permatex (Red, high temperature gasket maker) be ok for the water pump gaskets too?
Thanks for your help.