Decode engine block - Vintage Mustang Forums
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post #1 of 14 (permalink) Old 03-20-2019, 05:33 PM Thread Starter
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Decode engine block

My 71 Mach1 originally had a 302 2V. It now has a 351W 4V, I am just trying to find out whatever I can about it.

I found this stamped number which I believe is the block number D7TE-AA with a 6 stamped under it.

Can anyone decode for me? I have did some Google searches but looking for others information.
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post #2 of 14 (permalink) Old 03-20-2019, 08:06 PM
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I don't think that is a "stamped" number but rather a "raised" number that was cast into the block, not stamped into it after casting.
1977 block redesign paid for by the truck division.
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post #3 of 14 (permalink) Old 03-20-2019, 09:24 PM Thread Starter
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Sorry, you are right raised casted not stamped.
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post #4 of 14 (permalink) Old 03-20-2019, 09:35 PM
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Quote:
Originally Posted by JJHstang View Post
My 71 Mach1 originally had a 302 2V. It now has a 351W 4V, I am just trying to find out whatever I can about it.

I found this number which I believe is the block number D7TE-AA with a 6 stamped under it.
And it should be noted that even though the truck engineering dept paid for the design work on that version, it could have been originally installed on any Ford product, or even not a Ford product. The Ski Nautique ski boat often had a 351W, and I have even seen them in wood chippers.

Amateur restorer. Well, sometimes I have been paid for it. But not right now.
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post #5 of 14 (permalink) Old 03-20-2019, 09:47 PM
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Okay.... first, if it's TRULY a Mach1 (body code 05) then it didn't come with a 302-2V. The base engine for the Mach1 was a 351. If it's simply a Sportsroof (body code 02) then it could have come with a 302-2V (engine code F).

Next, I hope you found the D7TE-AA number on the water pump because if you found ANYTHING with D7TE on the engine block, itself, and the engine isn't friggin' huge, it's a 351M/400. If it's a Windsor you'll find the block casting number on the lower block behind the starter motor. You might also find a partial VIN stamp on the back of the engine up by the lifter valley rail.

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post #6 of 14 (permalink) Old 03-21-2019, 06:12 PM Thread Starter
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Well according to my vin number 1F05F223B96 63R. 1 = 71, F = Dearburn, MI, 05 = Mach 1, F = 302 2V, 63R = Fastback.
Other numbers I have found 3 5E, 3 = paint color Bright Red, 5E = interior Vermillon Knitted Vinyl. E = build date May 1971.
I did find the number on the water pump, which I should have mentioned. I tried lower block but couldn't find a number. I know it is a Windsor by the number on value cover bolts.
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post #7 of 14 (permalink) Old 03-21-2019, 06:24 PM
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Originally Posted by Woodchuck View Post
Okay.... first, if it's TRULY a Mach1 (body code 05) then it didn't come with a 302-2V. The base engine for the Mach1 was a 351. If it's simply a Sportsroof (body code 02) then it could have come with a 302-2V (engine code F).

Next, I hope you found the D7TE-AA number on the water pump because if you found ANYTHING with D7TE on the engine block, itself, and the engine isn't friggin' huge, it's a 351M/400. If it's a Windsor you'll find the block casting number on the lower block behind the starter motor. You might also find a partial VIN stamp on the back of the engine up by the lifter valley rail.
Actually at one point the 302 was offered. Dont remember if they started offering in 1971 or 1972. Thought it was 71 but note sure.

Current piles of rust 1965: New yorker***1968: GTO convert, Lemans convert Porche 911***1969: MustangGT convert, Mach1 S code Mach1, Mach1 CobraJet R code GTO convert, Firbird Convert 1970 Boss 302***1972: Charger***1999:f250 CNG truck***2011:nissan Altima ---> I need to get rid of some of this junk lol
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post #8 of 14 (permalink) Old 03-21-2019, 07:10 PM
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The standard engine in the 69-70 mach1 was a 351 2V. The standard engine in the 71-73 mach1 was the 302 2V.
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post #9 of 14 (permalink) Old 03-21-2019, 07:20 PM
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The standard engine in the 69-70 mach1 was a 351 2V. The standard engine in the 71-73 mach1 was the 302 2V.
That's what I thought but was not 100 percent sure.

Current piles of rust 1965: New yorker***1968: GTO convert, Lemans convert Porche 911***1969: MustangGT convert, Mach1 S code Mach1, Mach1 CobraJet R code GTO convert, Firbird Convert 1970 Boss 302***1972: Charger***1999:f250 CNG truck***2011:nissan Altima ---> I need to get rid of some of this junk lol
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post #10 of 14 (permalink) Old 03-21-2019, 09:15 PM
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Quote:
Originally Posted by Woodchuck View Post
Okay.... first, if it's TRULY a Mach1 (body code 05) then it didn't come with a 302-2V. The base engine for the Mach1 was a 351. If it's simply a Sportsroof (body code 02) then it could have come with a 302-2V (engine code F).
sorry Woodchuck, 71-73 Mach 1 base engine was a 302-2V.



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Originally Posted by JJHstang View Post
Well according to my vin number 1F05F223B96 63R. 1 = 71, F = Dearburn, MI, 05 = Mach 1, F = 302 2V, 63R = Fastback.
Other numbers I have found 3 5E, 3 = paint color Bright Red, 5E = interior Vermillon Knitted Vinyl. E = build date May 1971.
I did find the number on the water pump, which I should have mentioned. I tried lower block but couldn't find a number. I know it is a Windsor by the number on value cover bolts.
Sounds like a nicely optioned car. Bright Red w/Vermillion interior makes for a very striking look. Block casting numbers are on the block behind the starter. You'll probably have to remove it to see them. Two bolts, no biggie. Number of valve cover blts wont tell you whether it's a 302 or 351W, as they are both Windsor engines. Easiest way to tell is to look at the cast water boss for teh waterpump passge on the block. The top of the boss on the 302 is machined when the head gasket surface is decked. The 351W is 1" higher in this area - see pics below.
Attached Images
File Type: jpg 71M1.JPG (129.9 KB, 5 views)
File Type: jpg 302.JPG (55.9 KB, 4 views)
File Type: jpg 351w.JPG (47.0 KB, 37 views)

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71 Mach 1

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FORD OE TACH HOOKUP FORD OE TACH HOOKUP w/MSD (pg 7)

Last edited by Hemikiller; 03-21-2019 at 09:26 PM.
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post #11 of 14 (permalink) Old 03-21-2019, 10:03 PM
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I stand corrected. Thanks.

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post #12 of 14 (permalink) Old 03-21-2019, 10:46 PM Thread Starter
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Thanks Hemikiller, I appreciate the pictures, and info. As far as 341 W I am going from what the person I bought it from told me. Mine looks like the pictures of exterior and the interior of the automatic. Mine has the rear window louvers. It came with AC but doesn't work. In fact I am going tomorrow to drop off down payment to AC person and get new vintage air installed.
No problem Woodchuck. This is my first mustang and I am just trying to find out everything I can. It seems when I want a part knowing as much as I can helps.
After AC I want to get dual exhaust. I am finding out that there are not any complete kits for 71's sold. Not exhaust, not AC.
I appreciate any and all information. Next post will be transmission related.
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post #13 of 14 (permalink) Old 03-22-2019, 01:17 PM
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Originally Posted by JJHstang View Post
Thanks Hemikiller, I appreciate the pictures, and info. As far as 341 W I am going from what the person I bought it from told me. Mine looks like the pictures of exterior and the interior of the automatic. Mine has the rear window louvers. It came with AC but doesn't work. In fact I am going tomorrow to drop off down payment to AC person and get new vintage air installed.
No problem Woodchuck. This is my first mustang and I am just trying to find out everything I can. It seems when I want a part knowing as much as I can helps.
After AC I want to get dual exhaust. I am finding out that there are not any complete kits for 71's sold. Not exhaust, not AC.
I appreciate any and all information. Next post will be transmission related.

Previous owners are notoriously FOS - full of s***. Before you drop any money buying parts for a 351W, please make sure that's what you have. Either verify the casting number by the starter, or take a look at the block in the pics above. Another good indicator is to look for the part or casting number on the intake. Regardless of whether its a stock or aftermarket intake, it should have some sort of identification on it. Not trying to burst your bubble, but if I had a dollar for every time someone called an engine a 351W and it actually was a 289 or 302, I could buy my family a very nice steak dinner.


Mustangs Unlimited sells a kit and H-pipe for the 71-73 to make a 302 dual exhaust.

Dual Exhaust Kit 2" 1971-1973 302 Mustang | Dual Exhaust Kits | Exhaust Systems | Exhaust | Mustang | MustangsUnlimited.com

You can also use any 65-70 exhaust kit and have the H-pipe made by a local exhaust shop.

Nothing worthwhile is ever quick, cheap or easy, those that can't do, complain

71 Mach 1

HOLLEY TECH PAGES
FORD OE TACH HOOKUP FORD OE TACH HOOKUP w/MSD (pg 7)
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post #14 of 14 (permalink) Old 03-23-2019, 03:37 PM Thread Starter
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Thank you, I will check the measurement. Or search some more.
Also thanks for the exhaust information if I would happen to have a 302.
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