Is the top one on the offside loose? If so then it's going to be a case of continuing to put a bit of pressure on it and hitting it.. sometimes whilst it's under pressure, using 2 hitting devices at the same time on either side of the swivel knuckle gives it enough to a shock to get it to pop loose. If the top isn't loose yet, the get that one loose and it can help the bottom one...
Just think - you're 2/3 of the way on total disassembly now, and the refit is DEFINITELY easier than the removal!!
Most people would have given up by now, cursing and calling the vehicle a heap of sh*t - But I imagine there are some parts on any vehicle of the P38's vintage that has some rusty bits that take forever to get apart!
You'll get there! :)