Brake booster swap ???

[mindhive]

I used the search and got confused so I am going to ask. I have a 70 c-10 swb with manual drums all around. Can I take the "power booster,brackets the funny pivot thing between the brackets and the push rod" off of a 72 K-20 (parts truck) with power disc/drum and connect it to the 70 pedal and master cylinder? In my confusion I am thinking I will have power drums that may be a little touchy due to the 3/4 ton booster. Am I correct?

Tim

[19mike69]

i dont know what booster i have but it works great.I bought it off of ebay i think,got it home and didnt adjust a thing,just bolted it right on.And i have drums all the way around too.Id say it dang near stops as good as my 03 dodge

[LONGHAIR]

Just make sure to keep the "drum brake" master cylinder and proportioning valve. You need the residual valve to keep some pressure on the drum brakes. A "disc brake" master cylinder will always have a low pedal(on a drum brake truck) because there is no residual valve to maintain pressure.

[krue]

Originally Posted by mindhive

I used the search and got confused so I am going to ask. I have a 70 c-10 swb with manual drums all around. Can I take the "power booster,brackets the funny pivot thing between the brackets and the push rod" off of a 72 K-20 (parts truck) with power disc/drum and connect it to the 70 pedal and master cylinder? In my confusion I am thinking I will have power drums that may be a little touchy due to the 3/4 ton booster. Am I correct?

Tim

I used a 3/4 ton booster on my drums and don't have any problems with "touchy" brakes. And to answer your question ...Yes you can just unbolt your m/c bolt the booster in between it and the firewall, change the connecting rod from the pedal to the booster and you will be good to go!

[Putter]

Off hand, where would you connect the vacuum line from the master cylinder if you are running a 250 inline with a single barrel carb? I have all the parts (booster, etc... from a donor truck) but haven't had a second to bolt it on yet.

[68C15]

you mean ther is room for the booster with a 250? I thought the manifold was in the way. one of the reasons I went to small block.
if it does fit, just drill & tap a hole near base of carb. make sure to have a shopvac sucking while drilling & fill flutes of tap with grease to catch metal chips.

[Putter]

The way I understand it, the stock air cleaner for the non-power brake setup will not work (it is in the way...bad), but I have a relocation plan.