have a 69 camaro that we put a big block amd a console shifter. i have a new alternator, battery and voltage regulator. with the car off, it has 12.56 volts, and with it running it draws amps!!!!! the car has an msd 6al in it too. also the car wont rev above 4000 rpms. not sure if this is connected as i dont think the msd is getting enough juice. thanks in advance!!!!!