I picked up a craptastic old 72ish Raleigh Record frame, fork, headset, and cranks (cottered of course). The headset is pretty seized up and I have spent the last two evenings reefing on the lock nut to try to get this apart to overhaul this but have had no luck (I admit, I'm not the strongest and have been going at this with a pair of channel locks) Any ideas how I can get this off? Doesn't seem rusted, just on really tight.

Also, I know there are some pretty bad compatibility issues with the bottom brackets and the 26tpi threading. So, I think I'm just going to try to take it apart and clean it up myself. Seems to be more or less in good working order, just some surface rust as far as I can tell. Cottered or not, I'm not scared. Aside from buying some new cotter pins for that any major pitfalls forseen? I've never dealt with cottered before, but I figure if I screw it up it will give me an excuse to get a better frame.

I really don't want to put much cash into this, just play with it and see what I can do. I've got everything else I need to build it up to a beater fixie for the girlfriend. Thoughts?