Vacuum brake single or dual diaphragm?

[krom415]

looking to do a vacuum brake swap soon did the homework on the boards ,but nothing is mentioned about single,or dual diaphragm booster ...does it matter or is 1 preferred over the other? I was looking at a set-up for a v-8 monte and they have both listed not to much difference in price.

 

[turbojd]

You want the dual diaphragm booster.

 

[cuda6pak]

Which car is the dual diaphragm off of?

 

[turbojd]

You can try an 80's regal or Monte SS or later model G-body.