Vintage Tech Advice - July 2013
Beyond the Basics
We own a 1966 GT hardtop that originally came from California. The car is equipped with manual disc/drum brakes and, for safety reasons, I want to convert the master cylinder to a dual chamber. Upon closer inspection, the master cylinder appears to already be a dual braking system instead of the OEM single chamber version. The car does not have a Brake Warning light but it does have a pair of brake lines attached to the master cylinder. One goes to a small distribution block and splits to the front brakes. The second line goes to an undefined valve before exiting to the rear drum brakes. I cannot find any information on this master cylinder and would like to know if it can be retained as a dual system.
Ken and Colleen Wiens
Kamloops, B.C., Canada
Based on the photo, your Mustang is equipped with the factory single master cylinder for disc brakes, which were standard on GTs. A dual reservoir master cylinder for a ’67 Mustang will bolt on. The correct pre-bent lines needed for the swap are readily available from Classic Tube (800/882-3711; www.classictube.com). One line will go to the distribution block for the front brakes and the other line will go to the adjustable proportioning valve you mentioned for the rear brake circuit.
I have a 1967 Mustang hardtop that I have owned for 42 years. More than ready for a restoration, it was originally a Sports Sprint with the 289 two-barrel, C4 automatic transmission, power steering, and factory air conditioning. I would like to use a ’69 Cougar donor car to transplant a 351 Windsor with headers, FMX transmission, tilt steering column, power steering, power front disc brakes, and air conditioning. The parts I would like to use are from the radiator to the rear end, including engine, shifter with linkage, driveshaft, and 9-inch rear (3.55 Traction-Lok), complete with leaf springs. Also, I would swap the front suspension, including the strut rods, tie rods, upper and lower arms, power steering linkage, and brake spindles/rotors. The Mustang has the steering column with the long shaft that I would swap out for the Cougar tilt column and steering box.
I know most of the parts are an easy swap. Can you tell me what will need to be modified and what will not work at all?
Fort Smith, AR
The ’69 Cougar and ’67 Mustang share most mechanical/powertrain parts. However, body parts will require some fitment. Basically, all the powertrain parts—such as the engine, transmission, and rear axle—will bolt in with the exception of the driveshaft. The Cougar utilized a longer wheelbase than its Mustang cousin so it had a longer driveshaft.
The front suspension and brakes are also very similar and should not be much of an issue. With some minor plumbing and rerouting of brake lines and power steering hoses, again it’s basically a bolt-in.
The steering column and automatic shifter are not direct bolt-ins. The dashboard shape of the different body style will require some modifications in order to install the later-style steering column. The shifter is also larger. You must use the later shifter assembly as it includes the neutral safety/backup light switch needed for the FMX transmission. The floor pan on the ’67 Mustang can be opened up to fit the larger shifter and the steering column can be adapted with some modifications to the dashboard mounting brackets. It may prove advisable to obtain ’68 dashboard/column bracketry, as ’68 Mustangs also utilized a collapsible column. Some “engineering” may be necessary. However, the steering box is a bolt-in and the column may be quite similar.
I recently purchased my first Mustang, a 1967 convertible. The car is a good driver and I plan on keeping it as such but I have initiated some minor repairs. The radiator is in poor condition so I plan to replace it. All the information I find regarding the ’67 core width indicates it should be 20½ inches wide. However, the width of the core in my car is 17¼ inches. Based on the VIN, I know that the original engine was a 200-cubic-inch six-cylinder. The current engine is a 289. I have contacted several radiator manufacturers and they all indicate that the 17½-inch-width core is for the ’65-’66 model year. Do I have the wrong radiator in my ’67? Would a ’65-’66 core fit in a ’67 Mustang? It does not appear that the radiator has been modified.
Some ’67 Mustangs did indeed use the smaller 17¼-inch radiator that was more commonly found in ’65-’66 Mustangs. These smaller units have wider side mounting brackets that make up for the different sizes so that only one radiator support was necessary for all models. Some also included sheetmetal spacers between the radiator brackets and the support.
You can either recore your existing radiator utilizing the correct brackets or buy a larger radiator that includes the side brackets. Either will fit the radiator support opening.
Let us hear from you. Send your ’65-’73 Mustang questions to: Beyond Basics, c/o Bob Aliberto, P.O. Box 205, Salt Point, NY 12578. Send email to firstname.lastname@example.org.