Diesel swapping this Old Mercedes Firetruck from the 60s! Mercedes L319/O319

We apologies for the video being the way it is, sadly youtube don't accept 7 minute shorts so you'll have to go through the pain of watching the video vertical, this is from last year but as we're trying to post more on youtube we thought this video even being upright would be better than no video? I may be wrong but we hope you enjoy anyway.