help me id this 390 block
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Freshman User
Joined: Mar 2009
Posts: 38
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From: ontario canada
help me id this 390 block
I recently bought a fe 390. apparently from a '69 merc. marauder. It's a 4 bbl /c6 auto. I'm not able to find any casting numbers on the block itself, there are none on the right side by the mount/freeze plug as with others i've seen,,.. but there are the numbers C8AE H on the right side of the head between the two centre plugs. Is this an acurate way to tell the year of the motor?, or just the year the head was cast ?. Does anyone know what compression ratio/ horsepower rating this engine is. ?... thanx..
Hotshot
Joined: Apr 2009
Posts: 14,333
Likes: 247
From: Stanley, VA
you CAN'T ID Ford engines by casting numbers. The casting number indicates when that casting was first used.
Ford used the same casting numbers for years and in the case of engine blocks the same casting numbers were used for several different displacements.
So trying to use the casting numbers to positivley ID what engine you have is pointless. The only positive way to ID your engine is to measure the bore/stroke.
Ford used the same casting numbers for years and in the case of engine blocks the same casting numbers were used for several different displacements.
So trying to use the casting numbers to positivley ID what engine you have is pointless. The only positive way to ID your engine is to measure the bore/stroke.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
1969 Mercury Marauder/Monterey/Monterey Custom = 390 2V ~ VIN engine code Y / B&S: 4.05" x 3.78" / Compression ratio 9.5:1 / 265 brake HP @ 4400 RPM.
1969 Mercury Marquis/Marquis Brougham = 429 4V ~ VIN engine code K.
1969 Mercury Marauder X-100 = 429 4V ~ VIN engine code N.
Passenger Cars thru 1979: The 5th digit of the VIN is the engine code.
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Since Ford cast ALL 352/360/390/410 & 428's as 352's, the block casting number is absolutely worthless for ID'ing what the engine size is.
The C8AE-H head (Ford part number: C8AZ-6049-M) was used in 1968/71: 390/428 cars & 360/390 F100/350's.
But....this head was also a FoMoCo service part replacement for 1965/67 352/390/410/428 heads, so...
Who knows what it could be found in today?
1969 Mercury Marquis/Marquis Brougham = 429 4V ~ VIN engine code K.
1969 Mercury Marauder X-100 = 429 4V ~ VIN engine code N.
Passenger Cars thru 1979: The 5th digit of the VIN is the engine code.
--------------------------------------------------------------------
Since Ford cast ALL 352/360/390/410 & 428's as 352's, the block casting number is absolutely worthless for ID'ing what the engine size is.
The C8AE-H head (Ford part number: C8AZ-6049-M) was used in 1968/71: 390/428 cars & 360/390 F100/350's.
But....this head was also a FoMoCo service part replacement for 1965/67 352/390/410/428 heads, so...
Who knows what it could be found in today?
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