Mustang MonthlyHow To Tech Qa
1965 Mustang Fastback & 1973 Mustang Mach 1 - Beyond The Basics
Vintage Mustang Tech Advice From Bob Aliberto
Bullet-Style MirrorsWhen I purchased my first car, a '65 Mustang fastback, in 1976, someone broke the outside rearview mirror while I was in class at high school. So I went to my local Ford dealership to get a replacement and, of course, they didn't have one. I asked the parts guy if he had anything that would work. He went back to the parts shelves and brought out a box that said "Mustang 2+2 racing mirrors" with about an inch of dust on it. Inside were two beautiful Shelby bullet-style rearview mirrors. So I bought them for $20 and installed them on my Mustang. Some years later while having bodywork done, the mirrors disappeared. When I went to buy a new set, I noticed they were twice the size of my original racing mirrors, which had glass about 2 inches across. I really loved the look of the smaller mirrors and I'm hoping you can help me locate a set. I've been looking for five years without success.Lynn JohnsonMorrison, CO
Outside rearview mirrors weren't standard equipment on Mustangs until the '66 model year. Outside mirrors on '6411/42 and '65 Mustangs either had to be ordered with the vehicle or installed by the dealer. With so many mirrors available, a dealership could install whatever style mirror they chose, including aftermarket, non-Ford mirrors.
I'll assume the mirrors you had were Ford mirrors that came as standard equipment on '66 Shelby GT350s because they were indeed referred to as "Shelby Bullet-style." These mirrors were small with the glass area the same diameter as the main body. The '65 Shelby GT350s, like other '65 vehicles, had dealer-installed mirrors that were larger in the glass area than the main body. They were actually copies of the English Talbot mirrors. Both styles are coined "bullet-style," thus the confusion.
I suggest you contact Tony D. Branda Shelby and Mustang Parts (1434 E. Pleasant Valley Blvd., Altoona, PA 16602; 800/458-3477; www.cobranda.com) as they have specialized in Shelby parts for many years, so they are well versed in unique Shelby components. Branda calls them Rotunda outside mirrors because they were originally sold through Ford's Rotunda accessory line along with seatbelts, tachometers, and such. These mirrors have just been reproduced with a larger base area to include a wider spacing between screw-mounting holes to cover up the holes from other wide-spaced mirrors. The new mirror will allow you to cover up the holes from a previous mirror installation
Oil Under PressureI have a question about oil pressure in a newly rebuilt 351 Cleveland four-barrel engine for a '73 Mach 1. I've had four oil pumps installed. Three pumped the pressure to 80 pounds and one to 70 pounds. This was done by hand-turning the pump. I'm thinking even 70 pounds is too high. I would like to resolve this before installing the engine.John BarryCovington, IN
Hand-priming a freshly rebuilt engine will always indicate an unusually high oil-pressure reading. Oil pressure is determined by the amount of difficulty, or restrictions, the oil must pass as the pump tries to push it through. When the engine is running, oil passages line up many times a second; when the engine is not running, those passages may be blocked off. Oil feeds in the crankshaft and lifters inside their bores are two examples. Therefore, oil pressure measured for a running engine will be less than that produced by a manually operated pump on a static engine.
The oil pump could produce well over 200 pounds of pressure if it didn't have an internal bypass valve. The bypass is controlled by a coil spring, thus the amount of pressure a pump can produce is determined by spring tension. I believe the difference you have noted between your oil pumps is simply a slight difference in spring tension, and you are well within tolerance. Your 70 to 80 pounds of pressure is typical while hand-priming and I'm sure it will drop into a more normal range once the engine is fired up.