12V Negative Ground Electronic Ignition Kit with 12 Volt Hot Coil (Rated up to 55,000 Volts) Internally resisted: 

Delco Clip-held Distributor Electronic Conversion Kit: USA Made Distributor Cap, USA Made Rotor, USA Made Spark plug wire set, 4 Autolite 295 Spark Plugs (14mm x 3/8" Reach)

Allis Chalmers B, C, CA, G, H3, IB, WC, WD, WD45, WF D10, D12, D14, D15, D17

Please verify your tractor has 12V Negative Ground & the 4 Cylinder Delco Clip-held Distributor (Clockwise Rotoation). This Tune up kit does not fit Delco Screw Held or Prestolite Distributors or Magneto.

This kit includes the Autolite 295 plugs. Verify your tractor requires the Autolite 295 plugs (14mm x 3/8" reach).  Some models listed may require a different spark plug size.