When I first got my 70 barracuda it was front drums with manual brakes. I swapped it to 73 challenger front disks with power brake booster, master cylinder and all. I now am swapping back to manual brakes but keeping the front discs and using a 73 duster master cylinder. The problem is the brake light switch does not touch the pedal now and there isn't enough adjustment in it to move it closer to the rod on the master cylinder. Any suggestions?