New Guy! Need some help!

I have a 70’ Roadrunner with a 383, and it’s been giving me some starting issues. The motor won’t crank all the time, maybe 1 out of every 7 times on average. When I turn the key, it’ll make a little clicking sound and won’t turn over. Also the headlights are dim, radio and dash accessories don’t turn on even when the key is in the run position. Everything seems to be on when the car is running only. I’ve replaced voltage regulator, starter solenoid, positive and negative wires for the battery and the ignition switch. Maybe the ignition switch needs some adjustment? Any information would help, thanks!

-Berj
Author: berjkara