I found an 8 lug spare, it's off a 95 E250 Ford van ( I called a stealer with the part#). Can I use this wheel for a spare on my 90 LE250, I sure hope so

 

its the same wheel pattern. the only thing to check is to make sure the center bore will fit over your hubs. the offset might be a hair bit off but it should be ok as a spare. but i would physically make sure it fits before mounting it. last thing you want is to not have checked and need it in the middle of nowhere and have it not work