Hey Scotty I have a 1969 Buick skylark. The other day when I started the car but I let it warm up…

Hey Scotty I have a 1969 Buick skylark. The other day when I started the car but I let it warm up for about five minutes then accelerated and it backfired. After the backfire none of the electronics in the car were working. When I turn the key nothing. I can't even turn on the headlights. Checked the battery it's OK. Please help

false