Replacement ignition points difference between ch 13 14 15?

[cawcislo]

Looking at replacement points and in my searches I come up with cross reference numbers such as ch13v ch14v, ch15v and similar. What’s the difference between the 13, 14 and 15 ignition points? Is it spring pressure? They all appear to look the same and say they will work for small block mopar. Thanks.

 

[toolmanmike]

@halifaxhops may be able to answer that one.

 

[halifaxhops]

Yes spring pressure. Think the 15 are higher off the top of my head. 13 is kind of rarer than 14 and 15.

 

[cawcislo]

Yes spring pressure. Think the 15 are higher off the top of my head. 13 is kind of rarer than 14 and 15.

so what would be the recommended application for 14 vs 15? Would the 15s with higher spring pressure be better for higher rpms?