A Lincoln master parts catalog may help in determining the length.  Otherwise just determine the length once you have the engine back in the chassis and order a new one.  Recently ran into this when converting a ’60 ford to a later model water pump and new radiator as the original spacer was no longer adequate.

Lorena, Texas (South of Waco)

I'm finding many different ones out there with 8546 in the numbers. Different letters before and after. Some advertised as Ford. If someone knows the length that would help. AutoZone and advanced don't have mine. Summit has different sizes. Sure wish I could just find mine

Brad
Sierra Vista Arizona
1954 Lincoln Capri

The length of the spacer is important. You don't want the fan to be too close/too far away from the radiator. the edge of the fan should be about 1/4" outside the shroud.  

Fan spacer. Available from Summit and other online hot rod suppliers. Also from Advance auto Parts, AutoZone, etc. They won't look exactly the same as the original but will do the job.

Part #8546. Can't find mine. What's it called? Available somewhere?

Brad
Sierra Vista Arizona
1954 Lincoln Capri