the factory magnum flywheels, while they will bolt up to the crank, will not fit inside the older car bellhousings. magnums only came in trucks, so they used a larger diameter 143tooth flywheel, where the older cars used 10.5 130 tooth flywheels. the 143 wont fit inside the 130 bellhousing. this is why there's been so much discussion on this thread about the ability to use a factory magnum style EFI harness, like mine, on an old 3 or 4 speed car. you either need a 130tooth flywheel with magnum style crank sensor notches cut into it, or a bellhousing that will house a 143 tooth flywheel AND have the 833 bolt pattern.
it's tricky, but theres a number of ways to make it happen
