brake booster question

[1967psat]

I have the brake booster assembly from a (A) body on my 67, 7 inch? Can i fit the universal 8 inch power booster PB1083A with out major modification's .

 

[Kern Dog]

The A body unit used from 1973-1976 used a stand-off bracket that bolted to the firewall using the same pattern as a non power master cylinder. The reduction linkage was on the engine side. The stock B body boosters bolted to the firewall directly and the reduction linkage was on the interior side.
This means that to use the 73-76 booster, you’d need to have a firewall stiffening plate for a non power brake B body.
I don’t know about the size differences of the A body boosters nor anything of the A body boosters used 1972 and before.

 

[Demonic]

If that booster is good, it should work well. Good advice from Greg above. That’s part of why it’s a popular swap. Well, maybe was a popular swap. Hard to find a disc A body nowadays. If your pedal effort is high, maybe a different bore M/C is needed, IF nothing is amiss.

 

[Kern Dog]

I had an 1 1/8” bore master cylinder in the car once and it was horrible. The pedal was so firm, it felt like it was welded in place. The brakes barely worked.

 

[Fran Blacker]

This booster is similar to the one on my 66 Satellite bolt pattern on back different. I bought it as a core but won't fit my Hemi bracket. Measurements for this booster are on inside circle. The hard to number is 3-3/16".

 

[Dave6T4]

Real Hemi booster also had 3/8" studs instead of 5 /16" . Booster pictured is likely for 383/440 car with disc brakes, and mounts directly to firewall. Later B-vans used this as well, mounted on a 90 degree bracket under the hood.

 

[440 4 speed]

Real Hemi booster also had 3/8" studs instead of 5 /16" . Booster pictured is likely for 383/440 car with disc brakes, and mounts directly to firewall. Later B-vans used this as well, mounted on a 90 degree bracket under the hood.

67 440’s with power disc’s had the same booster and bracket as the hemi’s also.