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Old 09-29-2003, 12:39 PM
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Update Mstr Cyl for 55 Olds

Anyone have any suggestions on how to go about updating original master cylinder on my 55 Olds. I'd like to get rid of the Mstr Cyl unit located below the steering arm and locate a modern unit on the firewall. I realize there are no simple kits for my Olds as there are for Chevys and some others. Therefore, to mount a modern master cylinder on the firewall I'll have to clean up that area and probably fabricate a mounting plate. I understand I should choose a master cylinder that is used in a car of equal weight - yes? Also I'm told I should use an adjustable portioning valve - yes?

The wheel cylinder kits are available as are the drums and shoes, etc. I plan to replace the lines with pre-bent, any recommendations on a supplier?

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Old 10-04-2003, 03:28 AM
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I believe Rod and Custom had an article on this some time ago. You might contact them. I had a 56' Olds and was going to convert it as well. I read the article, but can't remember who had the kit. Sorry I can't help you out more.
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Old 10-04-2003, 04:13 AM
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brakes tip

if your going to all the trouble of changing the brakes please use a dual circut master cyl at least that way you will have some
stopping power in the event of a leak shure theres a hand brake
but a dual curcit is a wise choice also if your unsure about any thing use a whole system of a later model of a simaler weight
safe rodding Ian
P.S the knowlege base has a lot of brake stuff go there next

Last edited by ianhealey; 10-04-2003 at 04:37 AM.
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Old 10-09-2003, 05:31 AM
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Cool

Because of the similarities in design between the GM models you should find it quite easy to use a unit designed for a 55-57 Chev with very few if any problems. You'll also need some brake line and a flaring tool capable of producing double flares, but it's very do-able and doesn't have to be expensive.
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Old 10-14-2003, 01:49 PM
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Adapting Aftermarket 55-57 Chevy MstrCyl

Yes, I probably can adapt the aftermarket master cylinder upgrade kits for the 55-57 Chevys. I'd have to prepare the firewall to allow mounting of the new unit. The Chevy kits have replacement firewall plates, however, my Olds has a couple of "boxes" I'd have to remove and fabricate a mounting plate. I would also have to do some adapting of the brake pedal. I'm not sure if the original pedal detup would work, maybe have to adapt a hanging pedal type, not sure yet. Thanks!
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