What GM small bodied vacuum booster (mates to corvette master cylinder)

[Madgyver]

What small body vac booster are we using for GM Master cylinder?
79-81 Monte Carlo?

 

[Yeller]

Maybe…. 82 Malibu has an 8”. I don’t recall ever seeing a 7” booster on anything GM. There are several aftermarket options that are available. If you have room an 80 Corvette booster is a nice step up in power, same length just larger diameter. This 7” booster should work

 

[pcf_mark]

All the Corvette boosters 68-82 are the smaller diameter. They are narrow but they are thick.

 

[pcf_mark]

Not that you asked but I would go hydroboost every day , all day long. I had vacuum boost on my Bronco and old Corvette and they stink compared to hydroboost. Not even close. My 68 Corvette had the narrow booster but it is thick - like 4". With four wheel disc brakes it was pretty good but nothing like the hydroboost.

 

[DirtDonk]

Do you already have a booster meant for a bronco? Why not just elongate the bolt holes in the master cylinder?
Isn’t that the only fitment issue, or is there also a problem with the rear register and piston depth?