2 types of GM SRW D60 hubs?

[az-k5]

I was changing out the hubs on my mom's 1976 1 ton short bed crew cab (that's right we built a short bed) tonight and ran into a small problem. There is no recess slot for the large C-clip to fall in. Ya know the one that holds the actual hub back. With out this recess slot the locking cap has about an 1/8 of horizontal play when bolted on (the stub shaft c-clip is the only thing holding it in). Is this a full-time hub that was poorly converted (PO was a POS /forums/images/graemlins/angryfire.gif). My 60 has the large C-clip so I assumed that this one would too.
What do I need to do?
(please avoid saying new SRW hubs -> that is probably the answer though)

 

[big83chevy4x4]

you probably could take one of your and both of hers to a machine shop and machine the groove in. /forums/images/graemlins/dunno.gif

are you sure there is no groove? is it full of grease /forums/images/graemlins/dunno.gif

 

[az-k5]

I ran a small screw driver around it really hard and found nothing. I blasted brake clean in there till the metal was shiny again and no groove to be found. I sucks cause I thought the hubs were half junk (hoping to use them as trail spares). I can cut a groove in them if I have to.

 

[white-rhyno]

Man I thought I was the only one with those hubs. Sucks. I looked all over for that groove. Im just running drive flanges for now.