Hallo everybody, can anyone help me identifying the head markings of my Longchamp's engine?

Many thanks

ManuelIMG_1004[1)IMG_3660IMG_3661IMG_3664

 

Attachments

Images (4)
Last edited by George P
Original Post

The true head casting is actually on the underside, reach out to other Longchamp owners to compare engine VIN (location, font, style)

 

 

EDIT *******  upon reflection and closer examination, you may have a 1972 LTD motor short VIN 2P*10541 with 1975 or 1985 heads. ******

I found a single reference to DT engine VIN. so will need another to confirm OE. Check your intake

The DT OE stamp should match your VIN plate

Deauville engine stamp

 Deauville VIN plate

 

 

Attachments

Images (2)
Last edited by George P

The last production 351C engines (both 2V and 4V versions) were assembled in the US circa June 1974. 351C engines with 4V cylinder heads were never assembled in Australia. Australian heads do not have a "2" or a "4" cast in their corners.

4-dot cylinder heads were cast in the US for M code engines manufactured from July 1970 through June 1971 (D1AE head castings), and Q code engines manufactured from July 1971 through June 1974 (D1ZE and D3ZE head castings). However there was an extra run of D1AE-GA head castings produced for the NASCAR teams in about the time frame of 1975/1976, the same time frame in which the first batch of Australian sourced NASCAR blocks were also manufactured. A 4-dot head with a December 1975 casting date would almost certainly be one of those D1AE-GA castings, having 66cc quench combustion chambers.

Heads from this batch of castings were not installed on any production engine, thus these heads were added to this short block after the fact; no doubt the short block was originally equipped with open chamber heads.

Last edited by George P

Many thanks. It's a 1975 Longchamp. I'll chack if the  block is D1AE-GA . what's the difference between these heads and regular production ones?

 

D1AE-GA is the casting number of the heads, not the block. The casting number of the block is most likely D2AE-CA.

There are no differences between these heads and the earlier versions cast from July 1970 through June 1971. They were machined for adjustable valve train (studs & guide plates, plus spring cups) the same as production Boss 351 heads.

Last edited by George P
denisc posted:

The true head casting is actually on the underside, reach out to other Longchamp owners to compare engine VIN (location, font, style)

 

 

EDIT *******  upon reflection and closer examination, you may have a 1972 LTD motor short VIN 2P*10541 with 1975 or 1985 heads. ******

I found a single reference to DT engine VIN. so will need another to confirm OE. Check your intake

The DT OE stamp should match your VIN plate

Deauville engine stamp

 Deauville VIN plate

 

 

Thanks Denis, the engine stamp numbers and letters "CMD 074" is from my 1973 Deauville. Longchamp has 351/1057

George P posted:

D1AE-GA is the casting number of the heads, not the block. The casting number of the block is most likely D2AE-CA.

There are no differences between these heads and the earlier versions cast from July 1970 through June 1971. They were machined for adjustable valve train (studs & guide plates, plus spring cups) the same as production Boss 351 heads.

George P posted:

D1AE-GA is the casting number of the heads, not the block. The casting number of the block is most likely D2AE-CA.

There are no differences between these heads and the earlier versions cast from July 1970 through June 1971. They were machined for adjustable valve train (studs & guide plates, plus spring cups) the same as production Boss 351 heads.

Indeed is D2AE-CA. what does this tell us about the engine?

Attachments

Images (1)

D2AE-CA

D = the decade made "70's"
2 = year produced
A = Full size Ford 
E = engine part

also seen in your picture

1G9

1= 1971

G= July

9= 9th day of month,

therefore block was cast 9/jul/1971

 

denisc posted:

D2AE-CA

D = the decade made "70's"
2 = year produced
A = Full size Ford 
E = engine part

also seen in your picture

1G9

1= 1971

G= July

9= 9th day of month,

therefore block was cast 9/jul/1971

 

thank you all!

 

Add Reply

Post
×
×
×
×
Link copied to your clipboard.
×