Shep69 149 Report post Posted April 14, 2019 I’m wanting to start my 302 w that is mounted on my 56 F-100 chassis. I’m just going to do some basic wiring like what’s in the pic attached. I’m just wondering what size fuses I should use and were I should put them in the circuit. Quote Share this post Link to post Share on other sites
Mach1 Driver 560 Report post Posted April 24, 2019 The ignition circuit does not have any fuses- apparently they would rather burn up wire than stand someone because of a blown fuse. Since you are pointing at the battery cable connection, I have seen 200 amp fuses placed in the line. The line from the battery to the ignition switch runs the coil through the resistor and isn't normally fused. The resistor is 1.66 ohms on our Mustangs. If you had a 0.6 ohm coil you could expect that combination to be less than 6 amps, so don't go less than 20a. 1 Shep69 reacted to this Quote Share this post Link to post Share on other sites
