@3_puppies is trying to be helpful. And in this case, he’s got better eyes than me. I noticed the tstat housing right away, but missed the WP. It looks to have a funky spacer on the back of it an OE pump never would have had. If so, that would be a considerable part of your clearance issue.
Are you planning to run a dual groove water pump pulley as well? That is the ‘preferred’ method.