I have an 80's Fuji bike and It's definitely well past time to replace the bottom bracket. The adjusting cup came off fine, but the crank side cup is super stuck. I've tried stacking lockring washers and cranking the crap out of it. I've tried any kind of penetrating oil, almost broke my park tool for removing keyed rings. That sucker is stuck. It's been driven through a couple winters and I don't recall ever being able to remove that side.
Any ideas on how to get the crank side cup off? Is it just easier/cheaper to find the parts and rebuild it?
OH and yes I know it's reverse threaded! :D I'll be sure to grease the crud out of the new one when I can get it in.