67 Barracuda Notch with 273

My 67 273 w/276 gear will break loose 1 tire. My changes... OEM single plane intake and 2 brl replaced w/73 dual plane and 2 brl., points replaced w/73 electronic ignition and chrome box, and timing tweaked.
You already have dual plane and 4 brl. so even with the OEM points ignition, look at timing. The OEM tuning specs just don't work, especially with todays puppy pee for fuel.