One(1) rail is for JJS4586 style stop and the other is drilled for JJS4587 style stop
Quality Aftermarket Differential Lock Coupler
700" bottom I
3/16" line: JJS8558
Electronic Ignition Conversion Kit Fits Ford Tractor | 12-VOLT Negative Ground Carburetor One(1) rail is for JJS4586Quality Aftermarket Electronic Ignition Conversion Kit 12V Negative Ground Fits 1965 1982 Ford Tractor Models: 550, 2000 (3 Cylider), 2100, 2110, 2120, 2150, 2300, 2310, 2600, 2600V, 2610, 2810, 2910, 3000, 3055, 3100, 3110, 3120, 3150, 3190, 3300, 3310, 3330, 3600, 3600V, 3610, 4000 (3 Cylinder), 4000SU, 4100, 4110, 4140, 4190, 4200, 4330, 4340, 4410, 4600, 4600SU, 4610 Verify distributor number for compatibility before purchase. Specifications Fits