Galfer install

It just isn't moving. I've put some penetrating oil on it. I'm on holidays at the moment, so don't need to rush. But I am dumbfounded how freakin crazy tight everything is. Maybe it's just anything to do with the abs. When I installed lines on the k6 gsxr1000 (non abs), it took 30mins total, including bleeding time. I'll let the oil penetrate and have a think about it. Would like to use heat, but not possible there. Tho a hair dryer might work.
On a positive note, I installed a wilbers rear shock, with a 3mm shim, yesterday. The difference in handling is night and day. I've only taken it on a 100 klm test ride, but the handling was outstanding.
So, the nut isn't moving.
Holding the nut, and trying to turn the block, also doesn't work.

The motherfudger is loose. I used a cheap little gas torch. There's another oem hard tube to use with a galfer female connector to come. I'm not even going to try with a spanner first. If it's as tight as the other one, it won't work. I'm going to start with a couple of heat cycles, then try the wrench. Thanks to those for their advice. It is appreciated.

I'm embarrassed to admit I've only fitted half the new lines, from the master cylinder to the first oem hard tubing. In the time to took to half do this job, in the past I can count lines I've fitted to six different bikes, 4 of my own, and helped with another 2. But all not abs, and so none had the crazy tightness of the abs nuts.
The galfer lines have an olive inversor, that fits in the galfer male junction, where the oem hard tubing screws into (so 2 of). They are loose, you just put them in the bottom of the female junction, and screw in the hard tubing. In the oem junction there is a similar item, but it is fixed. Excellent.
If that little brass item moves, like gets cocked, is not sitting perfecting flat when you are screwing in the male oem hard tubing, it will cause a leak. I discovered this at my first bleed. It's easy to move the female junction, tilt it, as you're working, and this may move the item out of position.
Galfer needs to fix those brass olive inversors into their junctions, make it as good as oem.
I've worked on my bikes soley for at least the last 15 years, but I'm still shocked at how big a pain in the ass this job was.
If you have abs and rubber lines, want to keep abs but add steel lines, pay someone to do it. If your oem fittings were as tight as mine, pay someone to have that headache.
Cheers