EFI considerations for a 1970 383 with very mid cam

The Sniper is probably your best bet. They have a lot of support and they generally work pretty well but they aren't perfect. I highly recommend buying from Summit rather than direct from Holley. Summit will exchange the Sniper if there is a problem but Holley won't. I also highly recommend a matching Hyperspark distributor. You can use an MSD box and coil if you already have one. You just need a box that has a "points in" wire so you can send the signal to the ignition box from the Sniper. If you don't have an ignition box then the Hyperspark box is okay, or use the MSD 6EFI.