Is this brake pedal to booster rod setup safe?

[Leinhit]

I appreciate the reply..

The eBay link u sent is not working..

The valve you sent in Amazon is a disk/ drum setup.. I have a drum / drum setup.. thus the question I have about if the master cylinder i have being made for a drum / drum setup, will it already have the proper proportional pressure to both front and rear systems built in..?

I'll keep checking the ebay link, or if you could repost it

Thank you