I have a 1986 Z-28 with a built ATK 350 that's bored .40 over. I have been blowing the 10A fuse for the radio. I have changed the fuse five times and then I replaced all of the fuses, to no effect. Any ideas why this ois happening?

 

Yea something on the radio circuit is drawing more then 10 Amps. When you are talking about 30 year old car it could be any part of the circuit. It could be in the radio, it could be a wire chafing against a bracket, it could be two wires rubbing together, it could be the fuse box itself. I would find a diagram for the circuit and start disconnecting stuff. You may want to buy something so you can measure the draw.