With a proper block heater, glow plugs and even a thermal blanket, and the 23c will not let you down.....Ours NEVER did!! We are in the process of a MF 35 resto with a Perkins conversion, and the only reason for the conversion is the lack of injector lines and other parts, other wise the 23c would be staying.
When i was 13, i got a 133 for my birthday as a "project"
It had a frost cracked head so it hadnt ran for a while. We tried to crank it on the PTO with our 4712 but didnt check the oil. Someone also drained the oil. Result was seized engine.
Then my brothers bought 2 35's of a guy who just got married and didnt have time to finish the restoration. The engines were just thrown into bins, no one knows which pushrod belongs to what rocker, and what piston is seated to what set of rings and what liner.
I didnt have that much time and experience either, and my brother didnt have time to help, so in the end, when i was 16 we turned them all into scrap.
I could have supplied a lot of engine parts but we scrapped them 10 years ago...
Right now i have my 3011 as a project, i rebuilt the transmission 2 winters ago, i'm going to do a head job soon. I'm not sure if i'm going to restore the original mudguards, or will order some cheap Ursus C-360 mudguards which are still available and fit Zetors too because the design was handed over to Ursus...
I wont take a non-runner as a project anymore, but something i can do in stages, and put to use inbetween...
By the way, most injector lines can be made from universal parts. If you use brake lines it might be a good idea to replace all 4 so you cant get any difference in injection delay per cylinder. However the roughly 70 bar injection pressure of a Ricardo swirl chamber system, the injection lines dont deform much due to the injection pressure.