Warn Lock O Matic Hub Removal

[bill_utterback]

I recently bought a 1969 K1500. It was my grandfather's truck. It's a great truck but it's been off the road for about 20 years.

I was wanting to take the front drums off to check the brakes and wheel cylinders. My grandfather put Warn Lock-O-Matic hubs on the truck in 1978. The problem I have is part of the changes for the hubs involved removing the factory spindle nut. It's been replaced with something that has three tiny little allen head srews, and no notches for a typical spindle nut to grab onto.

I think to get it off I need a spanner tool or pin wrench, but I have yet to find something. Does anyone know of the tool I need, or do I just need to fabricate something, or use something all together different? Thanks in advance for any help.