H:

Suggest that you place the old and the new distributor caps and rotors side by side. Carefully compare all dimensions, and in particular the location of the molded-in keys that orient the cap on the distributor body, and the rotor on the shaft. Bosch used the same diameter caps on different engine applications, but with different key locations. Rotors were supplied both with, and without a resistor between center and tip, and in versions that had a centrifugal grounding contact for RPM limitation.