They're designed to be installed with no modifications. Part Number: PCE374.1005.
HEI Replacement Distributor Coil Cover Only - Black
HEI Replacement Distributor Coil Cover Only - Red
Racing HEI Distributor Coil For Chevy 262-454 5.0L 5.7L 7.4L V8 SBC/BBC 350 RED
Magnetic Coil HEI Electronic Distributor for Chevy SBC 350 G30 GMC 5.7L 5.0L V8
Speedmaster PCE376.1047, 65K COIL, HEI ELECTRONIC DISTRIBUTOR
HEI Distributor Coil Cover Only - A Style
