small block waterneck/thermostat housing question

I got one from Kregan (probably same supplier for NAPA/Carquest) after finding out that my original one was cracked. They are made in China and are iron (not alum). I used it for about a year and then found a old Canadian-made one at a car show for a buck and am using that now.

'Just a FYI for those who prefer not to have Chinese parts on their vintage Mopar muscle.