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I'm looking for some advice on how to remove the lower control arm pin (threaded axle) that goes through the crossmember.
I am preparing a standard HR disc brake front end for exchange for a Rare Spares one. I've removed the hubs, axles, upper and lower control arms and are back to a bare crossmember. I don't know if the Rare Spares exchange one comes with the lower control arm pin or not and the guy at my nearest R.S. store say's he's never supplied one before and doesn't know?

To be on the safe side I thought it best I keep mine.
Any advise would be great thanks.

Here you go courtesy of the fe/fc forum...

Replacing the lower inner pivot pins. At this point you will need a special tool that screws onto the pivot pin to remove them. There are a number of ways that you can get around this.If you don't have the special tool, you will need to grind a flat onto two sides of the pivot pins and use a shifting spanner to undo them. Alternatively you can weld a nut onto the pivot pins and undo them that way. Another way is to use the old pivot pin bushes, drill a 1/2 hole and weld a 7/16 unf (thread diameter) nut onto the hole. This is similiar to the special tool and can be reused to allow you to re install the control arm pivot pins. tighten the bolt and undo. They do get very tight and can rust in there. You may have to revert to one of the previous methods to get them to budge. Check to ensure that at some point the lower inner pivot pin hasn't been turning in the crossmember and has been welded in place.

Hope that helps!