Engine ID
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Fleet Owner
Joined: May 2009
Posts: 21,437
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From: Gilbert, PA
Engine ID
How do I I.D. what year engine I have?
Back in 94 I bought this 429 from a guy who pulled it from a LTD.
I rebuilt it and put it in my 80 F350.
But now I forget why year the engine is. IIRC it is a 71 or 72. But how can I tell for certain
Back in 94 I bought this 429 from a guy who pulled it from a LTD.
I rebuilt it and put it in my 80 F350.
But now I forget why year the engine is. IIRC it is a 71 or 72. But how can I tell for certain
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Best I can tell, the numbers are in the valley. Some pics show them on the sides of the block, but the date code is in the valley best I can tell.
Do you need to know so you can get parts or for other reasons?
Do you need to know so you can get parts or for other reasons?
Super Moderator
Joined: Apr 2004
Posts: 34,499
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Yes, under the intake.
I just found this. Scroll down regarding the date code on the passenger side of the block in front.
http://429mustangcougarinfo.50megs.com/decoding.htm
IF it's a '71 Thunderjet, it's 11, but I thought I heard they were 11.3 in the day.
Lots of casting number info here for 429s.
Kelly hotrod - Ford Engines Page 3
More discussion. Note one comment about the CR for the 2bbl being advertised at 10.5 despite the same pistons and heads. It was a "Premium Fuel" 2bbl as found in Mercurys.
https://www.ford-trucks.com/forums/2...hunderjet.html
Ford offered a 2bbl motor for cheapskates like my dad, and for people with insurance companies that became ill over 4bbl carbs.
I just found this. Scroll down regarding the date code on the passenger side of the block in front.
http://429mustangcougarinfo.50megs.com/decoding.htm
IF it's a '71 Thunderjet, it's 11, but I thought I heard they were 11.3 in the day.
Lots of casting number info here for 429s.
Kelly hotrod - Ford Engines Page 3
More discussion. Note one comment about the CR for the 2bbl being advertised at 10.5 despite the same pistons and heads. It was a "Premium Fuel" 2bbl as found in Mercurys.
https://www.ford-trucks.com/forums/2...hunderjet.html
Ford offered a 2bbl motor for cheapskates like my dad, and for people with insurance companies that became ill over 4bbl carbs.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 785
From: Simi Valley, CA
Casting number on block same 429/460.
Block casting number prefix: C8VE = 1968 / C9VE = 1969 / D0VE = 1970.
Block casting number: D1VE-6015-A - AB - AB1 - AB2 = 1971/73 429; 1971/78, some 1979 460.
Block casting number prefix: C8VE = 1968 / C9VE = 1969 / D0VE = 1970.
Block casting number: D1VE-6015-A - AB - AB1 - AB2 = 1971/73 429; 1971/78, some 1979 460.
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Fleet Mechanic
Joined: Sep 2003
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IIRC, my 1970 460s had the block number hidden by, or just above the starter.
For cylinder head prefixes, look between cylinders 2 & 3, and 6 & 7 by the exhaust manifolds just below the valve covers. That's what I remember, anyway.
A 1971 429/460 would still be high compression ~ 10.5:1. For 1972 compression is way down, and timing is retarded via timing chain and sprockets (the crank sprocket teeth vs. keyway position).
For cylinder head prefixes, look between cylinders 2 & 3, and 6 & 7 by the exhaust manifolds just below the valve covers. That's what I remember, anyway.
A 1971 429/460 would still be high compression ~ 10.5:1. For 1972 compression is way down, and timing is retarded via timing chain and sprockets (the crank sprocket teeth vs. keyway position).
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Mountain Pass
Joined: Dec 2012
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From: Quemado, New Mexico
The ONLY 429s that ran 11:1+ compression was the CJ/SCJ, all Thunderjet 429's 68-71 are 10.5:1 whether 2 or 4 bbl carb. 460 Lincolns in this year range are also 10.5:1. All BBF dropped to 8:1-8.4:1 from 72-on depending on year, head, piston etc.
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