[DeTomaso] c & m blocks

[Kirby Schrader]

Yes... I got into an argument over this years ago when I had a 1979
Bronco with a 351M and put a Shelby Spearco turbo on it.

To me, it was a 351M and when it was turned it into a 400 with a
different crankshaft and lower compression pistons, I was convinced it
was a 400M.

I lost the argument....
:-)

Wish I still had that truck.... Although it was a 'pull through' the
carb setup, I could get 22 lbs of boost out of it with water
injection.

Trouble was... head gaskets suffered accordingly...

FWIW,
Kirby



On Wed, Aug 11, 2010 at 10:12, GW <gow2 at rc-tech.net> wrote:
> By the way there is no "400M". Its a 400 or a 351M (modified, destroked
> 400).
>
>
>
> wkooiman at earthlink.net wrote:
>> Agreed, but why would you do a 400M when you can do a 408C?
>>
>> Even better, run a Dart or SVO block and do a 9.5" deck Clevor.
>>
>> The 400M obviously has a better rod angle, and it isn't stroked to 400, so you don't need a stroker crank, rods, or pistons.  But... does that make up for the motor mount mods, custom headers, intake spacers, and the difficulty in finding an FMX block (or running a 385 bellhousing)?
>>
>> -----Original Message-----
>>
>>> From: GW <gow2 at rc-tech.net>
>>> Sent: Aug 10, 2010 10:29 PM
>>> To: JDeRyke at aol.com
>>> Cc: shawkins777 at comcast.net, detomaso at realbig.com
>>> Subject: Re: [DeTomaso] c & m blocks
>>>
>>> Uhm, what are you smoking? Comparing a 460 built with aluminum heads,
>>> intake to a stock 400 out of a truck?
>>>
>>> 351c weighs stock 550lbs.
>>> 400 STOCK out of a TRUCK weighs 575. 25lbs more.
>>> 460 STOCK weighs 720 freeking lbs! STOCK.
>>>
>>> You can't compare a stock truck engine to a hot rod aluminum intake/head
>>> engine. 500+ easy HP out of a 400 with damn good TQ through out the
>>> power curve and have been used many times. With aluminum heads, intake
>>> performance parts, etc they shed more then the extra 25lbs!
>>>
>>> Stripped down a 400 block IS A STROKED CLEVELAND!
>>>
>>> I agree the 460 is an amazing engine. I have seen them stroked to nearly
>>> 600 cubs making close to 900 streatable HP. But they are a bastard
>>> engine in a Pantera. I have seen people with 460's and they are all
>>> plagued by axle weakness. I have seen 2 break axles on launches form the
>>> poor angles required form moving the engines back. They just don't fit
>>> right.
>>>
>>> The 400 fits in the bay. Some header work, engine mount work but you
>>> don't have to redesign the whole damn engine bay. I love the 460 but it
>>> is an acheleis heal for those who have put one in. They still don't have
>>> the room to put the larger heads and such on they make the 900
>>> streatable HP.
>>>
>>> There are a couple 400's out there. Mine will be soon.
>>>
>>>
>>>
>>>
>>>
>>>
>>> JDeRyke at aol.com wrote:
>>>
>>>> On Tue 10/08/10 6:05 PM , "Steve Hawkins" shawkins777 at comcast.net sent:
>>>>
>>>>
>>>>
>>>>> This not accurate information. Almost everything on a 351C will swap over
>>>>> to a 400 except the crank, rods, push rods and motor mounts
>>>>>
>>>>>
>>>>>
>>>> What I said: you will replace everything in & on the (400) engine.
>>>>
>>>> I didn't say nothing off a real Cleveland would fit; I said   nothing off
>>>> the 400 is useful to a performance build-up, except maybe the cast crank in
>>>> some cases.
>>>>
>>>> And it sound like you've done exactly that in your build-up, Steve. Not
>>>> sure whether the stock Pantera alternator/AC bracket will bolt straight onto
>>>> the taller 400 block or if it also needs an adaption. You can advise us once
>>>> you get the engine set in place.
>>>> FWIW, a 460 stroked to 510-550 cubic inches and mildly tuned with with
>>>> aluminum SVO heads, alum. intake w/Holley 850 and alum. waterpump puts out maybe
>>>> 650 bhp on 91 octane & weighs 600 lbs: 50 lbs more than a stock 351-C's 550
>>>> lbs, according to the Byars Bros who swapped a dozen or so of these. My
>>>> chart from Ford's website shows stock 351M and 400M engine ass'ys weighing 575
>>>> lbs; believable given the 1" taller cylinder decks. Cheers- J DeRyke
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