Ok Can anyone teel me the difference in a cowl induction coil and a non cowl coil also any numbers for cowl coil. Thanks Again

The coil is the same; it's the bracket that is different. Small-block cars built with the ducted hood use the '66-'67 275/327 coil bracket. It mounts the coil at a greater angle to clear the larger air cleaner.

What about Big Block what bracket was used?

BB did not require a change. The production coil & bracket did not interfere with the ducted hood air cleaner.

Thanks for the info William / another mystery solved