1970-1977 master cylinder and booster

[2ndgener]

I have a manual brake 70 camaro with rear drums, a local guy is parting out a 77 z28, does anyone know if the master cylinder and booster will fit my 70? Also will the gear box interchange?

[Apogee]

To the best of my knowledge, the booster is the same from 70-77, so you should be good there. As for the master cylinder, the '77 is a 1-1/8" bore disc/drum unit as well, so you should be fine there. I believe they used the same 1-1/8" bore unit from 1970-1980 IIRC.

As for the gearbox, I don't know, although it might help if you specified whether it's a manual or power steering gear. There were two ratios to choose from, maybe somebody a little more familiar with the second gens with chime in.

Tobin
KORE3

[Skip Fix]

Gear box-depends some early ones had a coarse spline input shaft and later a 26 spline finer spline so clutch disc is different. Some Muncies had the same output shaft as a TH 350 M22 and some of the ST-10 in later ones had the same larger one as TH 400s. 77 is probably a ST-10 vs a Muncie and shifter linkage is differenet mainly the reverse linkage.

[2ndgener]

gear box-depends some early ones had a coarse spline input shaft and later a 26 spline finer spline so clutch disc is different. Some muncies had the same output shaft as a th 350 m22 and some of the st-10 in later ones had the same larger one as th 400s. 77 is probably a st-10 vs a muncie and shifter linkage is differenet mainly the reverse linkage.

sorry for the mix up but we were talking about steering boxes, my fault, thanks tho

[Randy67]

Tobin is right, 1970-80 booster & master cylinder interchange, only 81 is different with its aluminum master cylinder.

Steering boxes interchange as well, with 80-81 having o-ring fittings instead of flare fittings (power steering), but easy enough to work around.

[Skip Fix]

Steering box intermediate shafts change to metric around 79 for sure 81 also so different rag joint due to splines on the box. I think my 79 used the same splines as a later IROC box so may 78 and earlier for the box. They don't sell a new rag joint for the later boxes just a repair kit from what I remember on my 81. 79 I went Borgeson U joints and shaft.