71 351C engine markings

71ProjectJunk said:

Your best bet is to try the Concours Mustang Forum:
https://www.concoursmustang.com/forum/index.php
I know that there are a ton of different markings on these cars, and the markings sometimes change quite a bit even on cars from the same year made in the same assembly plant. Some things are pretty standard like the color codes on parts for the assembly man to know what specific part to use on a specific vehicle, but others can vary quite a bit. I have taken photos of my differential markings, and they are a little different an in a different place than others I have seen. The OK, or OIL markings would just need to be there, in a relative area where the inspector could see them. Different guys would put them in different locations, and with obviously different writing. If you are going to do a concours build, you basically need to figure out what is acceptable to the judges, and if you cars markings are not what is in the book for your make, model, and year, you better have very good documentation, that yours was done differently.

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Fabrice said:

That's some seriously good looking brake/suspension!
Love it!
One detail that I can't even see: there is a pressure plate behind the callipers, sandwiched with the flexible. I have changed these last year on my 73 and the damn cheapo things already started to rust. So may you live in a wet air state like me, I'd consider spray them while you can easy. I should have restored the originals that were not as bad after 50 years!

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tpj71mach said:

I tried searching for a previous thread on this but couldn't find one, I am not sure I am using the correct wording. I am trying to determine the correct engine inspection marking and stamps that would belong on a 71 351C. I like to detail the engines on my builds with all of the stamps and decals and writing that would have been done on assembly or installation, but do not want to get it wrong if I can avoid it. I would like to try and get this as right as I can as far as locations and colors etc. Searching the internet, I see some pictures with large "O-K" on the drivers valve cover, I have seen dome pictures with a smaller "OK" on the vale core and sometimes the same smaller "OK" on the drivers or passenger head. I have also seen a different smaller yellow stamp on the heads. I have seen all of these with and without a white number 3 hand written on the drivers head. It seems that there is a lot of discrepancies and I am trying to determine which, if any, of these are correct. Does anyone have pictures of your original survivor markings or correctly restored marking so I can learn what is correct and where to place them on the engine. I appreciate any help I can get on this, thanks

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rackerm said:

Hi TPJ71Mach,

I hope these pics help. They are from my 73 vert with a 351 2V Cleveland. I have more covering the undercarriage, C6 Trans, driveshaft, axle, shocks, and leaf springs if you are interested in those tags and paint marks. The green paint on the alternator is for a 60 Amp. The color was different for other amp models. For example, the 42 amp paint mark was a yellow/gold color. The same is true for the springs, air cleaner snorkel, and driveshaft, leaf springs, etc.

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Hemikiller said:

Here's a couple pics from a 71 that was for sale in NJ a few years back. This is an M-code 4V car, the H-code may be different. If you're just going for a "factory" look, then I'd just pic a good example and follow it. Ignore the emissions decal on the fan shroud, that's obviously an owner add on.

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Stanglover said:

I wasn't going to post these pics as they are for an M code, but these decal that are left are for sure original. I didn't take many at the time I got the car in 08, wish I had. At this time, the motor had never been touched other than a Holley carb, belts and hoses, the usual stuff. I'll also add a pic of how I detailed it now, i.e. engine code. Sorry I don't have more.
As for the wiper motor, you can get a new stamp made to replicate what you have. A friend did this for his car, but I did not bother (yet) for mine.

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tpj71mach said:

Thanks, those are exactly the kind of pictures I was hoping for to help me see where these marking and stamps and labels go. Wow I love your attention to detail! Great job! Did you refinish your wiper motor? If so how did you replace the lettering? I cleaned mine up but would have preferred to repaint the black but was afraid of losing the lettering.

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