The biggest problem with that install is the lack of mounting holes for the A/C. Maybe not a problem in your area.
Pin type glow plugs can be had for the early head. They come in a kit from Bosch under any of these numbers: FGK2, 0 250 201 901, or 0 250 201 955.
Bosch Master, ASE Master, L1
33 years MB technician