The hub size on a stock '79-'93 4-bolt front end and Lincoln Mark VII (which is what I assume your 5-lug front rotors are from) is 64.2mm. The SN95 wheels hubs have a 70.6mm opening.
These wheels MAY fit, but you won't know for certain until you attempt to bolt them on. The early style hubs are one piece with the rotor...as such, they center hub protrudes out some and can interfere with the dust cap. The SN95 style set up has the hub as a separate entity from the rotor.
If that's the style you want, then get them. Even if they don't work with your current 5-lug set up, this would be a good excuse for you to step up to a set of '94-'95 front spindles. Not only will they allow you a wide array of wheels to choose from, but more importantly will allow you to upgrade to the '99-up dual piston front brake calipers...which are light years better than the current single piston set up you've got now.
You can pick up a set of spindles used for well under $200...and covert to the later style calipers for about $100 more than that.