1947 vs 1947-Late Models

[dorvedahl47pu]

Greetings,

I've got a number of 1940-1947 pickups and big trucks. Two of them are "1947 Late" configured in that the cowl wiring harness is different than the typical 40-47 configuration. The only functional difference I have noticed is that the 47 Late configuration does not have the firewall mounted CB and ignition resistor panel. The CB panel in the late configuration is mounted to the instrument panel but there is no ignition resistor.

Given that fact, how is the ignition circuit different? Is there then no voltage drop required in the ignition circuit? Are there changes elsewhere that might account for there not being a resistor? Does the coil need to be a different type/style, different condensor, etc.?

Basically, I'm looking for something that explains how the ignition system works in the 47-late verses the typical 40-47 configuration.

Thanks in advance.

Dale