Brakes losing pressure at red lights, any ideas?

Thanks everyone. Converting the M/C to a dual has been on my list, but I guess the time is now! I like the original exterior but not concerned about under the hood being original. I already updated to a Pertronix for better ignition and will go with an HEI at some point. Also want to do the headlight relay project. Both using parts from members here!

KosmicKuda, appreciate the suggestion on 73-75 a-body power. Are there any clearance issues with that?

I'll search the forums on converting to two lines into M/C.