1971 351 #'s help please
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Laughing Gas
Joined: Jan 2007
Posts: 765
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From: Fairmount, Georgia
1971 351 #'s help please
I have found a 1971 351 for sale and the guy thinks it may be a cobra jet but is not sure and neither am I. The casting number I got is D2AE-CA and the casting for the crank is 4MA. Can someone please tell me if this is a cobra jet or a plain jane or what.
Posting Guru
Joined: Jul 2007
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an easy way is to look at the carb´s size, you could also look at the serial number from the car vin where it came from it should have a Q code:
1 Last digit of model year
T Assembly plant (F-Dearborn, T-Metuchen)
02 Body code (01-Coupe, 02-Fastback, 03-Convertible, 04-Grandé, 05-Mach 1)
M Engine code
100001 Consecutive unit number
Example:
1T02M100001
1 Last digit of model year
T Assembly plant (F-Dearborn, T-Metuchen)
02 Body code (01-Coupe, 02-Fastback, 03-Convertible, 04-Grandé, 05-Mach 1)
M Engine code
100001 Consecutive unit number
Example:
1T02M100001
Posting Guru
Joined: Jul 2007
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the engine codes for a 71 are:
250cid 1V 6-cyl 145 hp L Code
302cid 2V V-8 210 hp F Code
351cid 2V V-8 240 hp H Code
351cid 4V V-8 280 hp Cobra Jet Q Code
351cid 4V V-8 285 hp M Code
351cid 4V V-8 330 hp Boss R Code
429cid 4V V-8 370 hp Cobra Jet C Code
429cid 4V V-8 375 hp Cobra Jet-R J Code
I have a mach 1 with a 351w with the vin number starting: 1T05H,
hope this helps
250cid 1V 6-cyl 145 hp L Code
302cid 2V V-8 210 hp F Code
351cid 2V V-8 240 hp H Code
351cid 4V V-8 280 hp Cobra Jet Q Code
351cid 4V V-8 285 hp M Code
351cid 4V V-8 330 hp Boss R Code
429cid 4V V-8 370 hp Cobra Jet C Code
429cid 4V V-8 375 hp Cobra Jet-R J Code
I have a mach 1 with a 351w with the vin number starting: 1T05H,
hope this helps
Cargo Master
Joined: Apr 2001
Posts: 2,364
Likes: 3
From: Eustis FL
This casting number can be a 2 or 4 bolt main engine, depending on whether it is a CJ or Boss or other.
Since it is 1972 though: R-code 351 HO, 1972, and Q-code 351 CJ, 1971-73 are your choices if it has 4 bolt.
Looking under the pan will tell you how many bolts on the caps.
Any of these castings can be machined for 4 bolt caps. You can buy the 4 bolt caps from aftermarket, like http://www.flatlanderracing.com/newmaincaps.html
Since it is 1972 though: R-code 351 HO, 1972, and Q-code 351 CJ, 1971-73 are your choices if it has 4 bolt.
Looking under the pan will tell you how many bolts on the caps.
Any of these castings can be machined for 4 bolt caps. You can buy the 4 bolt caps from aftermarket, like http://www.flatlanderracing.com/newmaincaps.html
Senior User
Joined: Feb 2007
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D2AE-CA=1971-1974 351 Cobra Jet Casting number
4MA=A crank from a 1971 Boss 351 or a 1972 351 High output. Info. Source, High Performance Ford Engine parts interchange, By George Reid.
EDIT::: After conferring with a few more sources, that info is incorrect. I am sorry. All 72-74 blocks were cast D2AE-CA and did not have to be a CJ engine. Sorry the interchange book is Wrong. Cranks too, sorry.
4MA=A crank from a 1971 Boss 351 or a 1972 351 High output. Info. Source, High Performance Ford Engine parts interchange, By George Reid.
EDIT::: After conferring with a few more sources, that info is incorrect. I am sorry. All 72-74 blocks were cast D2AE-CA and did not have to be a CJ engine. Sorry the interchange book is Wrong. Cranks too, sorry.
Last edited by FXForistell; Oct 4, 2007 at 01:58 PM.
Thread Starter
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Laughing Gas
Joined: Jan 2007
Posts: 765
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From: Fairmount, Georgia
Thanks folks for your help but I have decided to go for a complete 460 that the same owner has for the same price. Thanks again for the info and the effort.
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Cargo Master
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From: Eustis FL
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Help !!!!!
Originally Posted by trinogt
Well, thanks for stopping by the 335 forum just the same...
I'll have the Roast Duck
Joined: Jul 2002
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From: Northshore, MN
3M6 would dictate the casting of the block on December 6th, 1973. To verify this, a decal on the valve cover will indicate being built after Feb. 1973 (before would be a tag mounted somewhere). However, it still falls under the timeline of the 351C. (1974)
The letter A in your casting code would just be a full size Ford, nothing specific.
The letter A in your casting code would just be a full size Ford, nothing specific.
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Originally Posted by havi
3M6 would dictate the casting of the block on December 6th, 1973. To verify this, a decal on the valve cover will indicate being built after Feb. 1973 (before would be a tag mounted somewhere). However, it still falls under the timeline of the 351C. (1974)
The letter A in your casting code would just be a full size Ford, nothing specific.
The letter A in your casting code would just be a full size Ford, nothing specific.
Posting Guru
Joined: Jul 2007
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Originally Posted by mustang81
I mesure the top of 351m400 intake manifold from edelbrock : 12 1/2 "(+/- 1/4")