EFI considerations for a 1970 383 with very mid cam

I love my Holley Sniper, however I could never get the Hyperspark distributor and matching coil unit to work without back firing so I'm running it with my old pertronix distributer and accell coil. It runs great, starts great when cold, but does suffer from hard restart if I shut it off and try to immediately restart the engine when it's hot.