Wrapping up the next phase in Courtney’s Sedan build up we needed to securely mount the steering box, brake and clutch system. With cowl steering there are some inherent issues to deal with like pedal placement and couple that with an engine mounted high in the frame and make it a manual trans! Well, space is at a premium. Poking the master cylinders through our newly fabricated and clean firewall wasn’t an option and the steering box takes up some real estate so moving the cylinders to the right side of the car is the solution we chose.
The brake and clutch pedals operate through concentric shafts housed in an aluminum tube. The brake tube is supported inside the aluminum mounting tube with PEEK plastic bushings. The inside of the brake tube is machined smooth and it supports the clutch shaft. The clutch shaft itself is made from 4340 bar stock and has three machined journals for needle bearings to ride in. You will notice there are three master cylinders. Two of which operate the brakes through a balance bar system like you would find on a race car. Brake bias is achieved through threading the balance bar left or right which moves the spherical ball mount inside the bellcrank giving a differential force advantage on one cylinder over the other.
The steering gear in this case is a late 60’s to mid 70’s MOPAR steering box with a custom made pitman arm.
Last left off with the frame fab, we have done a ton since.
This HAMB thread covers quite a bit of the progress: http://www.jalopyjournal.com/forum/showthread.php?t=404411
This is one of those things that gets overlooked in the details. The aftermarket has come up with some stellar components and some not so stellar. But when you use high volume production parts, your car will look just like everyone elses. This car does use SoCal hair pins and a SoCal forged heavy beam axle but that’s about where it all ends.
This car runs the spring behind the axle, what is commonly known as “suicide” and requires special batwings or hair pins to mount the spring and carry the entire load of the front of the car. Not one to skimp out we cut and machined a nice pair for this car. Our initial mock up was using the supplied SoCal stainless steel pieces. Very nice with a shock mount integrated. Just not the parts we really wanted.
With a way to attach the spring to the axle, we needed to attach the hair pins to the frame. The shape of the frame plus the location gave us a few different options. Most people would weld a tube or bung into the frame to attach a HEIM or bushing to. We opted for stainless steel tie rod ends from So Cal and fabricated this nifty little plate that cancels the angle between the frame and hair pin.
By request, I made a short run of these adapters for you Econoline guys. This keeps the stock pedal and bushing arrangement, no cutting or drilling should be necessary. You will have to provide or lengthen your master cylinder push rod for the master cylinder you intend on using.