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carguy47

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My Car
1971 Mach 1, M-code
Hello members. I recently purchased a 1971 Mustang Mach 1, M-code car that was in great shape however the previous owner lacked the skills and awareness on how to keep a classic car running. Leaks EVERYWHERE and just worn-out parts.
Additionally, as usual, the original 351C-4V (Marti Report) was missing and replaced at some point with a 302.
So, I am in the process of rebuilding the car to be driven and enjoyed!
 

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Joined
Jan 2, 2019
Messages
235
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155
Location
Wisconsin
My Car
1972 Mustang convertible, 351C 2V with FMX (#'s matching)
Currently equipped with 351C 4V 4BM, .060 over, roller cam, Sanderson block huggers, -AC
Hello members. I recently purchased a 1971 Mustang Mach 1, M-code car that was in great shape however the previous owner lacked the skills and awareness on how to keep a classic car running. Leaks EVERYWHERE and just worn-out parts.
Additionally, as usual, the original 351C-4V (Marti Report) was missing and replaced at some point with a 302.
So, I am in the process of rebuilding the car to be driven and enjoyed!
Welcome from WI and please take your time on getting her safe to drive first, and then giver hell!
 

carguy47

Well-known member
Joined
Apr 3, 2022
Messages
117
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43
My Car
1971 Mach 1, M-code
Welcome from WI and please take your time on getting her safe to drive first, and then giver hell!
Absolutely. Way too many variables on this car. Seems to be 1 step forward, 2 steps back!
 

carguy47

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My Car
1971 Mach 1, M-code
I am used to making/fabricating panels (may be taboo) for my hot rods. If I can't find it, or it isn't aftermarket - MAKE IT. So this is what I did with the grill support. My car is an early 1971, however as I am finding out, these are the holy grail of grill supports. My car has a 1972 bracket, so I made (1) panel.
 

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Joined
Apr 24, 2020
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Location
Pittsford, NY
My Car
My all time favorite vehicle is our 1969 Shelby GT500
Welcome from Pittsford, NY (Rochester suburb! We have two 1973 Mustangs. One is a deeply re$tored and moderately hopped up Mach 1 sporting a street/strip built 351W (not C), a 3.5:1 TractionLok rear axle gear set and an AOD 4 speed automatic tranny. The other is a True Survivor Convertible that was barn stored over 40 years. It currently has just over 20,000 original miles on it, and is in near perfect, beautifully preserved condition. Both have had Classic aftermarket Air Conditioning kits added (neither had factory A/C), Dakota VHX analog gauge instrument panels, Garmin Drive 51 with backup cameras installed, and alternators rebuilt with high amperage output components to produce 65 amps with the vert, and 90 amps on the Mach 1 with its first generation side terminal style alternator. The higher output rebuilt alternators were deemed needed as the original alternators were only 42 - 43 amp units, and we also added dual electric fan cooling to both. At best the original output levels were marginally adequate, and at that only if the engine RPM was running at 2,000 or higher. The boosted output provided good output even at idle speeds, ad more than enough output at higher RPM levels.

Both Mustangs are a blast to drive, and while the Mach 1 is pretty zippy in terms of performance, and very nice to cruise in with the AOD, we also have a 1969 Shelby GT500 and a 2020 Shelby GT500 that can definitely eat the Mach 1's lunch quite handily were we into such pastimes. Luckily, at 67, I have largely outgrown petty street grudge racing, and now just enjoy cruising comfortably with whatever pony car I happen to have decided to go out in. All of them have A/C, both Shelbys have factory A/C, which for the 1969 GT500 was and is a bit of a rarity. It was one of the reasons I purchased that particular Shelby.

Anyway, I hope to see some photos of your Mustang, and to see you pitching in with questions and/or suggestions to questions from others once in a while. That said, I do not know if you have adequate shop manuals and wiring/vacuum schematics or not. My main GoTo for such documents in PDF file format (and inexpensive) is Forel Publications. I will provide their link below. I have found the 1973 Shop Manual from Forel, Volume 6 finally provides decent engine vacuum system schematics, but for pre-1973 such schematics were hard to find - until I came across the schematics produced by The Mustang Barn (free). With their knowledge and approval I pulled all of their individual 1967 - 1972 Mustang/Cougar vacuum schematics into a single PDF file, grouped by year and sorted by engine. I make that consolidated file available to anyone who may need it on a no fee basis (also), for love of the hobby. It is attached to this response for you and anyone else who may need it do download for your own use and to share with others as you deem appropriate.

Also, please be advised that the Color Electrical Schematic manuals from Forel Publications for 1972 and 1973 are really good and very complete and accurate with very few minor errors, the 1971 and prior schematics are lacking in the kind of content depth as found with 1972 and 1973. Thus, even though you have a 1971 Mustang, it would behoove you to get a 1972, or better yet a 1973, electrical schematic manual in addition to the 1971 electrical schematic manual. There are very few differences between 1971, 1972, and 1973 electrical systems. The biggest differences I have found are that beginning in 1972 Circuit 640 is used to power the carburetor Throttle Position Solenoid (TPS) on engines that included the TPS, and 1973 the electric choke was introduced, where the alternator stator circuit (with 1/2 the voltage output in Alternating Current (AC)) is used to power the carburetor electric choke. Everything is pretty much identical over those 3 years.


Here is the Forel Publications link:

 

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Last edited:

Sheriff41

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Joined
Aug 5, 2019
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409
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Location
Texas
My Car
72 Mustang Q-code
I am used to making/fabricating panels (may be taboo) for my hot rods. If I can't find it, or it isn't aftermarket - MAKE IT. So this is what I did with the grill support. My car is an early 1971, however as I am finding out, these are the holy grail of grill supports. My car has a 1972 bracket, so I made (1) panel.
Nicely done! There have been others on the site that have fabricated these pieces with equal success. Make something that works and if you find the original parts later you can replace these (if you would even want to!).
 

carguy47

Well-known member
Joined
Apr 3, 2022
Messages
117
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My Car
1971 Mach 1, M-code

[B]mrgmhale[/B]. The seller gave me 5-6 Ford manuals. One of which was a wiring diagram book.

I am used to the Mopar books that are VERY detailed and was a bit shocked at the lack of information.
However, can't argue with free!
 
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