[jwalker1970]

How are you jumping the relay? A. Crossing 2 big posts together or B. Crossing small post with big post (battery side)?

My suggestions: Take a test light to the small (start) post of your relay. Does it light up when you turn the key? If Yes, then your relay is bad or it is not grounded properly. In this case It will NOT start when you cross small post to Battery side lug.

If you are getting no power on your small (start) terminal, then check for a power at your "start" wire at the ignition switch. If you have power there, check continuity between start wire at ignition and your starter relay.

Good luck.

Note: Some Fords had a firewall relay (solonoid) and another solonoid on the starter itself. The spade connection on the starters were notorious for becoming loose and not contacting. (probably not in your case, but maybe check for good measure)