Booster to master cylinder - o-ring???

[DanPratt]

This is the new master cylinder for my 68.  I can't shake the feeling that the machined groove where it fits in to the booster should have an o-ring in it but it came without one (it was a booster and master cylinder kit).  Pictures of many other examples on the web don't show an o-ring either.  Any thoughts?

Thanks,

Dan

[MSRacing89]

Look up "master cylinder boot"......... You will see what that groove is intended for.  Should not be needed in your case since you are connecting to a booster.

[DanPratt]

Awesome, thanks MSRacing89, that makes perfect sense.

Cheers,

Dan