not sure what you're trying to fix
tf trucks have the same core support for I6 and V8 trucks
what you are missing is the spacer between the fan and pulley and a fan shroud
any fan mechanical or electric needs a shroud to pull air thru the radiator
this is a v8 fan spacer, probably 2'' long with longer bolts
this is a stock v8 fan shroud on my 59 panel truck
58-9 core support is a little wider but basically the same
here is the spacing between my radiator and motor
my 58 is an original v8 truck
this is my original v8 fan w/spacer and bolts.
i'll look to see if it's still out in the shop and send it to you if you need one
