Allows for running a redundant ignition system 1970-mercury-montego-esi3639760 425 in - Duration 252

425 in - Duration 252 / 252 - 110 LSA - 800 / 4800 RPM - Small Block Mopar - Each

Crate Engine - Drop-in-Ready - EFI - 383 Cubic Inch - 436 HP - Pulleys Included - Small Block Chevy - Each

750 in Long - Hex Head - Stainless - Natural - Sprint Car - Each

Timing Chain Set - Double Roller - Keyway Adjustable - Billet Steel - Small Block Ford - Kit

Wheel - Street Lite - 15 x 7 in - 4

Allows for running a redundant ignition system 1970-mercury-montego-esi3639760 425 in - Duration 252Running redundant ignition systems gives you piece of mind during long races, but how do you swap the coil wire to the back up ignition? The MSD Automatic Coil Selector solves this problem.