Shouldn't a '58 have a 292?
Yeah, take a look under the valve covers. Even if they are not oiling, you still may be able to make the trip. You'd be surprised how far you can go if you pull over now and then and manually lube the rockers. When I got my truck, the rockers were not getting oil. I oiled them once a week and drove it like that for about 2 years. When I finally took the shafts apart, they wear was not nearly as bad as I was expecting. This was mostly around town driving and short trips on the highway.
How big is the F700? There's an F500 in a salvage yard near me. It's really not that big. If the 700 is not huge, transporting may be a cost effective option.
Lawrenceville, GA