Mustang MonthlyHow To Tech Qa
1970 Boss 302 & 1969 Mach 1 - Resto Roundup
Concours Expert Bob Perkins Handles Your Restoration Questions
The '69 Mustang did not use the '70-style spoiler reinforcement bracket in the decklid. The '70 decklid has factory cutouts for the brackets. The '69 rear spoiler used four bolts for installation, rather than the four studs and nuts on the '70 spoiler.
The '69 spoiler is a rare find. Only the '69 Boss 302 offered the option from the factory. The rear spoiler was not a factory option on the Mach 1 until 1970. However, it was possible to order a '69 rear spoiler as a dealer accessory for the Mach 1 after the April 1969 introduction of the Boss 302. To be truly concours correct, a '69 Mach 1 should have the '69-style spoiler rather than the '70.
Down To The Gasket DetailsI have a question that will probably be considered a little off the wall by most readers. I was told by an older gentleman at the Mustang Club of America's Mustang 40th Anniversary Celebration that he could tell that the head gaskets on my '66 GT350 were aftermarket and not original Ford gaskets. My first thought was, Does anybody really care? But the more I thought about it, the more I wanted to know how or if you can determine if a gasket is OEM Ford or aftermarket, especially after it was installed on the engine and painted.
I have restored the Shelby to trailered concours specs and then some. I've used N.O.S. parts wherever possible. I even found an N.O.S. Rotunda oil filter and air-filter element. When putting together the engine, we used Fel-Pro head gaskets. I'd like to know if I made a concours (visual) mistake.Name withheld by request
There is a verifiable difference between genuine Ford 289 head gaskets and the currently available head gaskets. The correct Ford part number is C3AZ-6051-C. In the front corner, there is a circular hole in the gasket that protrudes from the cylinder head. This small detail is one of the things sharp judges often look for. Until this is published, I doubt that more than a few Mustang owners knew or even cared about details like this.
On the other hand, these details drive us crazy as we improve our cars to the next level of authenticity. Often, no one except the car owner will ever know some of the small details we do that sometimes aren't visible when the engine and car are assembled.