Difference RU4 VS RU11 Ballast Resistor?

[Dibbons]

My '72 Satellite has a two wire ballast resistor. I found a spare in the glove box marked RU11 but online search tells me it does not fit my application and that I would need an RU4? Anyone know the the differences here? Thank you.

 

[Badvert65]

Look at the blades of the resistor. They are usually marked with the resistance value. If the number is the same, so is the resistor.

 

[tak419]

I thought all 72 Satellite models had the electronic ignition which takes the 4 prong resister.

 

[Dibbons]

I guess the lowly two-barrel 318 had to wait one more year for the electronic system to become standard equipment.

 

[Badvert65]

Some cars had electronic ignition in 72, but it wasn't standard equipment yet. It was used across the line starting in 1973.

 

[tak419]

Learned something new today. I had always thought 72 was the year it was standard..I now know it was 73..

 

[NoCar2023]

4 barrel cars got it in 72.

 

[5.7 hemi]

7 is the difference.