Technical clutch arm

1957 chevy. new 11” clutch and pressure plate. factory was 10” but my flywheels wasn’t drilled for 10”. so i went with 11”. question is ,is there a difference between 11” clutch arm and 10” clutch arm. i know 1 “. do i need for my 11”? 283/4peed stock bell housing thanks

 

i seen 11” arms on ebay

 

Same fork for all.

 

cool. thanks.

 

Were you concerned about the extra 1/2 inch for clearance?

I ask because the throw out bearing is in the same location.

 

Same length ...maybe...but many different shapes ..

 

The distance from the clutch pivot ball is the same , therefore. So same business end length

 

Isn’t the question toward one model and it’s fork?

 

Yes, I knew that. But was wondering what the OPs concern was.
That’s all.