That is probably a TO-20 Ferguson rear end, the TO-20 are basically the same tractor, the handshake agreement between Henry Ford was during the 2n and onto the 9n, then Henry Ford died and Henry Ford ll came to be in charge and ended the agreement and made the 8n but still using Ferguson designed 3 point hitch, Ferguson designed the TO-20 as competition for the 8n, they both are very very similar tractors
