Not sure what my power brake setup came from but need to make some mods to the pedal location. The bracket for the master cylinder on my 46 Chev was located pretty much right above the GM steering column and accounts for the curve and twist in the arm. The problem is the pedal is more or less in the clutch location and way too high(not long enough). I have scrounged a few junk yards and haven't figured out what was used other than it's GM based on the looks of the brake cylinder and booster and the shaft. The GM column also appears to be 70s or 80s so they may have come from the same donor car although I did see a salvage AstroVan behind the garage when when I loaded the car up. In this setup, the short arm pushes the master cylinder rod and slides onto splines on the cross shaft, has a clamp bolt and uses a 70's/80's style GM style cross shaft retaining clip similar to GM Retainer Clip 382848. Th short arm has a casting number (15622314)but I haven't been able to determine if that is a part number or not. I would like to find another identical pedal to cut up and modify (as a spare) plus I need to rebush the cross shaft so knowing what I have would be very helpful. Last picture with the 2nd pedal shows approximately where it needs to end up and moving the master cylinder or switching to another setup is not an viable option. It would be nice if another vehicle used the same cross shaft and master bracket but the pedal was longer but I couldn't get that lucky. So far the longest pedal I have found is from a late 90s GM truck/SUV. The cross shaft setup is different but may be a good donor for the extension piece. Any info will be appreciated.
from the looks of it that is a clutch pedal kind looks like one I did on a s-10 , most gm brake pedals are directly infront of the MC and not offset so it will not deflect when applied real hard , I would not trust a splined shaft on a brake application , a clutch maybe but never a brake ..
My first thought when I dis***embled it was the pedal might be a clutch arm as well but the lower bracket lines up with the brake light switch mounts so don't think that is the case as it looks like the lower bracket is a factory weld. The short arm has a pinch bolt and the splines fit pretty tight so probably not a concern. I will have to rework the bracket to use a different pedal and kinda doubt there's a stock one with the right curve and pedal location so trying to avoid bracket rework. I did find one brake pedal with a bit similar bend but it had the later type cross shaft that uses a thru bolt. Can't remember what kind of vehicle though. Stimp - thanks - I'll try to find an S10 to take a look at. Anyone one else have an idea?
OK - I found a picture of a mid to late 90s S10 brake pedal and it is somewhat similar in shape to mine but uses the 1 bolt cross shaft and doesn't use the short arm either. But it has the right shape and potential as a donor for the extending the original arm though. Still looking to ID my pedal.
Hate to cut up the unknown pedal without a spare. Surely there's some old GM guys might recognize this thing. My guess is it's 70s or 80s or something offbeat like an AstroVan.
Forgot to ask opinions on welding rods. I don't have TIG and only a small MIG so planning on using 6013 or 7018 AC welding rod and crank up the amps to join the new pedal extension section. Guess I could tack it up and look for a TIG capable shop.
I'm far from being a welding expert, but I learned many years ago that some custom shops were using 6011 for important ch***is/structural AC/DC welds, and is when I (and the company I worked for) switched from 7018 to 6011. It's more difficult to use (you can't drag it) and it's not as pretty as 6013/7018, but has better penetration and strength. JMO.
thanks for the feedback on the 6011s. I found a welding forum and and someone mentioned using 6010/6011 for steam pipe welding. Guess I need to get some and see if I can master them. There was also mention of 7014's which I have never used.
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