80 3500 Base 8mm; Spiral Core; 500 Ohms Per Foot Of Resistance; Straight Boots. 69-71 3500S Base 8mm; Spiral Core; 500 Ohms Per Foot Of Resistance; Straight Boots. 71-73 D300 Pickup Base Eng. VIN: Y, 8mm; Spiral Core; 500 Ohms Per Foot Of Resistance; Straight Boots.