Question about brake cylinders

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Good afternoon, I ask: Are the brake cylinders 1 1 / 8 "fit well on the drums of a 76-FJ40 brake cylinders 7 / 8?
 
Good afternoon, I ask: Are the brake cylinders 1 1 / 8 "fit well on the drums of a 76-FJ40 brake cylinders 7 / 8?

Physical external dimensions are the same, if that is your question. You do realize that the larger bore will take more fluid to make it travel the same distance? So if you have ANY issue with excessive pedal travel, that will only aggravate it.

And, depending on your app, it will also mess up your brake proportioning from front to rear, which could cause you to have fishtailing brake lockup issues.

I wouldn't change without doing a LOT of homework first.

Best

Mark A.
 

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