Firecore sells a "convesion" cap for the factory dizzy that has HEI Male ends. See: https://www.customwiresets.com/product.php?productid=16275&cat=0&page=1&featured
I've been running this cap and a FBO mechanical advance selector plate for several years in my factory distributor. Works GREAT!

1972 Pro-Street 'Cuda, 500" Eagle stoker B Block, Eddy RPM heads, Victor Manifold, 850 Mighty Demon, Hemi 4 Speed, Dana 60 w/4.88 gears - Built by Hansen Racing Middlesex - NJ