Can anyone tell me if an 11" brake booster will work properly with 15* of vacuum at idle. I have a 9" booster currently, but want to put the 11" booster on the car. Thanks in advance for your help.

It should work just fine, providing there are no leaks.

should be perfect. i have an 11" w/front disk/rear drums and 13" at idle. i just converted to power disks last week and have been driving around the last few days. i have no complaints, stop and go, parking lots, etc... have not run out of vacuum yet.

I agree 15 is fine, I have less and my 11 inch booster works great.

Thanks guys, I will get started on the new booster!!
Lane