Thanks! Hmm, that's not helpful at all. Let's try another tactic.
Please click on "Continue to this website (not recommended)". When you do you should see a "Certificate error" button next to the address bar. Click on the "Certificate error" button. A new window should pop up with more information about the error. In that window you should see a "View certificates" link. Click on that link. It should identify the site for which the certificate was issued, and the name you see *should* be musclecarresearch.com. If that's what you see the problem is most definitely in the way your browser is processing the certicate. I don't know why it's complaining, but it shouldn't be. See if these URLs eliminate the problem:
https://musclecarresearch.com/1970-76-mopar-combo-valve-autopsyhttps://musclecarresearch.com/mopar-seal-kit-2