brake booster

[76bonanza]

I think my brake booster is leaking after I shut her down I can hear what sounds like air leaking from it. Also if I pull the check valve the next morning no vaccum should hold till next day I would think. Anyway looking to get a new one not sure if mine is stock or not. It seems to be 11 inches top to bottom. I have include pics. Just want to know if any stock 11inch booster will bolt right in? I think CPP has 11 inch boosters for like 140.00 that look really nice? Thanks

[FormerMember]

I would replace the check valve before buying a new booster.

Any engine fluctuation when you hit the brakes?

[76bonanza]

did the check valve thing already no change. Dont notice any engine change and brakes seem to work ok. But when I shut down I hear it hissing then in a few hours I pull out the check valve and almost no release. My other truck could sit for days and I would pull the check valve and it would pop and hiss.