Cool tractor. Being a 70xxx serial number, you have a Peoria built Holt tractor (1925). When production moved to IL, the name “2 ton” was adopted. The correct carb should be a t5t although a model 63 zenith should work as well. I picked one up on eBay for cheap with a whole rebuild kit. Very neat tractor.![]()
A keen observer will see a bolt beside the engine tag top photo. I am thinking that has been an attemt to fit a dipstick rather than fool with level plugs.