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1948 - 1956 F1, F100 & Larger F-Series Trucks Discuss the Fat Fendered and Classic Ford Trucks

1956 V8 4200cc engine

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Old Jul 26, 2019 | 10:44 AM
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1956 V8 4200cc engine

Hi all,
just bought this vehicle in UK auction. Any idea what engine is that??
The title says 1956 Ford F100 with Cadillac V8 4200cc, but as Ive done the research, Cadillac has never produced V8 4200cc engines.




 
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Old Jul 26, 2019 | 11:27 AM
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First of all, welcome to the forum!

Wow... that is quite the rig! Not sure on the engine other than it clearly looks carbureted. Looks like somebody grafted a late 80s/early 90s mercury or lincoln grill onto your 56 ford. For the record, 1956 ford f100s are very desireable, as they have great lines and represent a single year model... but most folks prefer a period correct/stock grill.
 
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Old Jul 26, 2019 | 12:49 PM
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4200 cc's = 317 cubic inches, but the smallest OHV Cadillac V8 was the first one, 331 cid introduced in 1949.
 
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Old Jul 26, 2019 | 01:04 PM
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Welcome Honza.
That is some truck! Love the color. Something is amiss in the engine specs. 4200 cc (4.2 liters) is only 256 cubic inches, and Cadillac never made an engine that small, with the smallest current being 365 cu in beginning in 1965. It is likely a 390 or 429 series engine because of the distributor location, or remotely possible a 472 engine that was introduced in '68.

I think the clue to the engine lies in what year that Cadillac grille is.
 

Last edited by Mixer man; Jul 26, 2019 at 01:14 PM. Reason: Grille.
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Old Jul 26, 2019 | 01:10 PM
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Originally Posted by NumberDummy
4200 cc's = 317 cubic inches, but the smallest OHV Cadillac V8 was the first one, 331 cid introduced in 1949.
I don't think so...... 5.0 which is 5000cc is a 302-305
 
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Old Jul 26, 2019 | 01:23 PM
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Originally Posted by bigwin56f100
I don't think so...... 5.0 which is 5000cc is a 302-305
Conversion by wiki-wiki...
 
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Old Jul 26, 2019 | 01:23 PM
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This picture was in the Oddball thread post #803
 
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Old Jul 26, 2019 | 01:30 PM
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That is a Cadillac 425 which makes sense as the other bits in the truck are from a late 70's Caddilac DeVille.
 
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Old Jul 26, 2019 | 01:32 PM
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Originally Posted by Mixer man
I think the clue to the engine lies in what year that Cadillac grille is.
You know, the more I look at that grill, the more I'm thinking its not a (US market...) ford or gm product. Doesn't seem to match any of the big sedans from the late 80's to early 90s for the cadillacs, grand marquis, etc.

edit... or late 70s or early 80s for that matter.
 
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Old Jul 26, 2019 | 01:43 PM
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Is that the fuel fill cap sticking out behind the drivers door? Odd for a 56 cab, which had the fill on the other side and raised about even with the door handle.
 
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Old Jul 26, 2019 | 01:56 PM
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Originally Posted by badger_hound
You know, the more I look at that grill, the more I'm thinking its not a (US market...) ford or gm product. Doesn't seem to match any of the big sedans from the late 80's to early 90s for the cadillacs, grand marquis, etc.

edit... or late 70s or early 80s for that matter.
'75 Cadillac Fleetwood.


 
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Old Jul 26, 2019 | 02:03 PM
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Terrible thing to do to a 56 at any rate..
 
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Old Jul 26, 2019 | 02:21 PM
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Originally Posted by Mixer man
'75 Cadillac Fleetwood.

Looks like we have a winner!!! Good eye!
 
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Old Jul 26, 2019 | 03:50 PM
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Originally Posted by badger_hound
Looks like we have a winner!!! Good eye!
You would have won the chicken dinner if you went back one more year.

So, supposedly that truck has the 500 inch Caddy engine.
 
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Old Jul 26, 2019 | 04:59 PM
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Ah well, next time Mixer!

I do recall seeing those big old caddy engines once in a while back when I was a gas jockey in my youth. Not often though!
 
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