Just use a quality sealer.. The best stuff out there IMO Is called "The Right Stuff" It wont leak no way no how. I have never had any water pump housing sealing problems... Ever and Most all my stuff uses a motor plate too. I made my own elephant ears using 1/4 Mild steel plate, drilled some holes and it works like a charm.
[color:"red"]65 Hemi Belvedere coming soon [/color] [color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]