[carnut]

I have just installed a TCI clip and am now looking to add the master cylinder to the firewall to plumb in the brakes. I am a little confused as to which way to go. I have front disc and rear drum. I need help to decide. Should I go with powered M/C or manual? if I go powered can someone tell me the most in-expensive way to go?
Thanks

 

[Chevy Kid]

Do a search on e-bay. I am using the 9-inch single diaphram booster with the 3 bolt mounting for a Nova. Works awesome. I got mine from Master Power Brakes.

Tim

 

[TomM]

Had the powered, took it off....no vacuum worries anymore. Now have manual, used a 69 vette MC...disk/disk...49 bucks at NAPA...works just fine. You could use any early model MC, like Nova with disc/drum....about the same cost, or do the Wilwood, little more pricey though.

T,

 

[true 118]

manual to power

any tips on replacing the manual master cylinder with a power master what about the studs coming thru the fire wall and do they make a seal to cover the big hole

 

[Sooner1]

Had the powered, took it off....no vacuum worries anymore. Now have manual, used a 69 vette MC...disk/disk...49 bucks at NAPA...works just fine. You could use any early model MC, like Nova with disc/drum....about the same cost, or do the Wilwood, little more pricey though.

T,

+1.
my master is out of a 68-75? corvette manual disc/disc.
i just put a 10lb check valve in the rear circuit.
pretty happy with it.

but to answer your question- if you already have a booster, just get the power disc master cylinder. it is 1 1/8" bore.
if you decide to go manual you will need shorter pushrod and master cylinder with 1" bore.

manual brakes work great, just a little more pedal effort.

 

[Chevy II]

Power Booster Mounting

I have a power booster setup from CPP that is suppost to be for the 62 Chevy II. Only thing is it has 3 mounting bolts and the stock mounting was with 2 studs in the firewall. Anyone done this conversion? Do you drill new holes, relocate the unit? It is a 9" booster. I have installed an LS1 and don't think the the booster will clear the engine coils. Anyone have information on this?

Thanks.

 

[ibuildm]

You need to knock out the stock studs and drill a third hole. There should already be a dimple in the firewall to locate it. There should be a knockout in the firewall for the booster since it ends up being lower than the original MC. You will hook the pushrod to the lower hole in the brake arm. If there is interference with a BBC or LS engine TCI has a bracket for a 7" dual booster that keeps it at the stock height and will clear most valve covers.
Tim

 

[novanutcase]

You could always fab in a late model mustang hydroboost. That should give you plenty of room to clear the valve covers on the LS.

John

 

[62civa]

Hydrobosst was standard on the early Astro vans too. My 1989 had Hydroboost, my 1994 Astro had a standard vacume booster. Not sure what year they switched back.
Ron