Very early models of these tractors had 1-1/8" inch PTO output shafts
3400 Tractors
Outside diameter of seed plate is 7-5/8" inches
L306D12 Undermount and Mid-mount Allis-Chalmers D10
New Distributor Drive Shaft for Farmall Tractors with IH Distributor, 353934R11 Very early models of theseNew the Engine Distributor Drive Shaft for listed IH Farmall and International Tractors and Crawlers with IH Distributors: A, AV, B, BN, C, Cub, Cub LoBoy, H, HV, I4, I6, I9, ID6, ID9, M, MD, MDV, MTA, MV, O4, O6, ODS6, OS4, OS6, Super A, Super C, Super H, Super HV, Super M, Super MD, Super MDV, Super MV, Super W4, Super W6, Super WD9, Super WDR9, T4, T5, T6, T9, TD14, TD14A, TD18, TD6, TD9, W4, W6, W6TA (Diesel), W6TA, W9, WD6, WD9, WDR9, WR9, WR9S,