OK I think I finnaly got this to work but I had to do a couple of things. It is not apparent to me where in the install docks that a the vmlinuz image is copied over and I couldn't find it. And then I think it was broken (I got an error saying the file ended short). So I have to to a pacman -S --force linux after running artools-chroot
The file system partioning I had to alter to comply with gpt bios and it looks like this
GPT fdisk (gdisk) version 1.0.4
Partition table scan:
MBR: protective
BSD: not present
APM: not present
GPT: present
Found valid GPT with protective MBR; using GPT.
Disk /dev/sda: 84276224 sectors, 40.2 GiB
Model: VBOX HARDDISK
Sector size (logical/physical): 512/512 bytes
Disk identifier (GUID): 3E4C94DB-B0BB-FD49-843A-D36D798ECCF2
Partition table holds up to 128 entries
Main partition table begins at sector 2 and ends at sector 33
First usable sector is 2048, last usable sector is 84276190
Partitions will be aligned on 2048-sector boundaries
Total free space is 0 sectors (0 bytes)
Number Start (sector) End (sector) Size Code Name
1 2048 4095 1024.0 KiB EF02
2 4096 208895 100.0 MiB 8200
3 208896 77803519 37.0 GiB 8300
4 77803520 84276190 3.1 GiB 8300
or from cfdisk dump
label: gpt
label-id: 3E4C94DB-B0BB-FD49-843A-D36D798ECCF2
device: /dev/sda
unit: sectors
first-lba: 2048
last-lba: 84276190
/dev/sda1 : start= 2048, size= 2048, type=21686148-6449-6E6F-744E-656564454649, uuid=D8CECAEA-E5EB-BA
41-AB9D-6DEA1CBF8CEF
/dev/sda2 : start= 4096, size= 204800, type=0657FD6D-A4AB-43C4-84E5-0933C84B4F4F, uuid=F888759B-2D8B-81
4C-8D68-0C3F83EBCCE8
/dev/sda3 : start= 208896, size= 77594624, type=0FC63DAF-8483-4772-8E79-3D69D8477DE4, uuid=B276A31F-2712-ED
48-93C4-9612BA899D1F
/dev/sda4 : start= 77803520, size= 6472671, type=0FC63DAF-8483-4772-8E79-3D69D8477DE4, uuid=75B88B22-18A2-BF
4D-A14E-716FC9C2A66D