power upgrades

i have a massey 165 with a 4cyl. perkins late 50' s model i think not quite sure. im big into sled pulling and got the tractor for free so i am trying to find any upgrades or performance parts , anything idc what, to try and make this think fun and pull something. tractor runs great i shred the place with it regularly so any input would help out tremendously. thanks.

I would start by turning the pump up then get a bigger turbo and add some water injection then pull the injectors and go at them with a drill bit to really open them up by this stage you might want to add a good lift pump one that could flow upwards of 68,000 GPH by this point youll be in the 40-50HP range and you could scrap this POS and fix your truck so can keep up with mine!!