No worries King. The silver colored striker attached to the door jamb looks to be a 4 7/8" ASA strike plate. The picture could have been deceiving me...
I tried to copy a picture but, I can't post URLs (whatever that means) until I have 15 posts.
On another note: I like the retrofitted seats and had considered doing the same thing. Any words of wisdom or caution would be appreciated.
Keep up the good work!!