Vacuum brake booster

[TURBOV6]

To convert out cars to vacuum brakes what size/dimensions do I look for?

MB Marketing & Manufacturing - New Brake Boosters

 

[SVORay]

I ordered a 9" kinda like these booster off that site. I'm not sure ATM what the part number is but if I find it I'll post it. I do kn ow It's an AC Delco.


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PB9513 GM 1973-94 9” Delco Style Dual Diaphragm Power Brake Booster (Black can) Exact copy of Delco with Threaded Rod.
Long Rod.

PB9514 GM 1973-94 9” Delco Style Dual Diaphragm Power Brake Booster (Black can) Exact copy of Delco with Threaded Rod.
Medium Rod.

PB9515 GM 1973-94 Chrome
9” Delco Style Dual Diaphragm Power Brake Booster (Black can) Exact copy of Delco with Threaded Rod.
Small Rod.