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Old Jun 6, 2023 | 09:34 AM
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Engine ID

Hey guys, I've got this 78 f250 4x4 super cab and am curious if it's been engine swapped. The vin runs that it would have a 400 but I thought the 351's and 400s all came with 2 barrels? This appears to be a factory 4 barrel intake. Would that give this a good chance of being a 460? Pictures kinda suck.

 
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Old Jun 6, 2023 | 09:39 AM
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Looks like a 460 to me. Not the original engine in that truck I don't think.
 
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Old Jun 6, 2023 | 09:45 AM
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This truck also has a 4 speed with a married tcase and not divorced like my 77's with a 351.
 
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Old Jun 6, 2023 | 10:05 AM
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Here's the block casting number D1VE-6015-A2B
 
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Old Jun 6, 2023 | 10:09 AM
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Married transfer case for 1978 is normal.

That is definitely a 385 series engine (429 or 460).

 
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Old Jun 6, 2023 | 10:12 AM
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Also, is that a square bore Edelbrock/Weber /Carter carburetor on the spread-bore intake? Looks like a good place for vacuum leaks to me.
 
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Old Jun 6, 2023 | 10:36 AM
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7 valve cover bolts, 3 along top, 4 along the bottom, none at top corners = 429 or 460.

The 351M and 400 have 8 valve cover bolts, 4 along top, 4 along bottom.

Spread bore intake, Carter Edelbrock like carb, don't believe it would have let throttle shaft turn much.
 
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Old Jun 6, 2023 | 01:06 PM
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Are there any numbers on the block that would determine between a 429 or 460?
 
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Old Jun 6, 2023 | 03:28 PM
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Originally Posted by Tom's 77 F250
Are there any numbers on the block that would determine between a 429 or 460?
No.
Block casting number prefixes: C8VE - C9VE - D0VE = Internal Balance = 1968/70 429 & 460.

Block casting numbers:

D1VE-6015-AB or A1B or A2B = Internal Balance = 1971/74 429 - 1971/78 & some 1979 460.

D9TE-6015-AB = External Balance, has a weighted crank spacer = Some 1979 460 - 1980/97 460.
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OP's engine has a Saginaw P/S pump. These were used on 1975 and later Econolines, 1972/78 Passenger Cars with Hydro-Boost.

429/460 have 7 valve cover bolts per side // 351C/351M/400 have 8 valve cover bolts per side

429/460: The fuel pump bolts to the drivers side of the timing cover.

351C/351M/400: There is no timing cover per se, just a flat engine cover plate.

The fuel pump bolts to the drivers side of the engine block, its bolt pattern is at 6 & 12 o'clock, the only Ford fuel pumps to use this pattern.
 
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Old Jun 6, 2023 | 05:20 PM
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Thanks for all the info! Looks like I'll be measuring the stroke. I'd be stoked if it's a 429.
 
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