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Mar 5, 2008 | 05:31 PM

GeerJammer

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Engine Swap

I have a 1978 F-150 whith a 351M. I have a 351C to put in the old girl. I was wondering if any one has done this swap? Or can help me learn a little more. I know the 351C ain't built for a pickup but I am going to do the swap. Just means I will have to gear down and stand on it when the need arrises. So if any one can help that would be great..

Mar 5, 2008 | 05:58 PM

mark a.

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It won't bolt up to the trans. If it's a auto you will have to fing a C6 with the small block bolt patern. If it's a standard you will need a small block bell housing.

Mar 5, 2008 | 05:59 PM

77f150got_sand

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From: lower Michigan

the first problem I see, is the 351M has a big block bellhousing and the 351C has a smallblock bellhousing, so if you have an automatic, you will have to change the transmission, if you have a 4 speed you will have to change the bellhousing. Second, the 351C has a shorter deck height, so I am not sure if you will be able to bolt on the 351M accessories.

Mar 5, 2008 | 07:02 PM

fdude64

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i thought the 351c was a big block and the 351w was a small block

Mar 5, 2008 | 07:08 PM

65f100_352

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The 351C/m & the 400 are technically small blocks. The 351m/400 has the big block bolt pattern, the Cleveland has the SB Ford pattern.

Mar 5, 2008 | 07:11 PM

RCrawler

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From: Southern Oregon USA

The 351C and the 351M/400 are in the same engine family, the 335 series. In all technicality, there is no such thing as small blocks/ big blocks in Ford engines.

Jason

Mar 5, 2008 | 07:13 PM

77f150got_sand

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the 351C and 351W have small bellhousing, 351M has big block

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Mar 5, 2008 | 07:22 PM

RCrawler

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351W is the same as the late 289/302.

Jason

Mar 5, 2008 | 10:52 PM

#10

GeerJammer

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Thanks that is somthing that I have not heard yet about the bell housing. What about motor mounts? I have heard that I will have to build a custom job or will something else work, or any ideas at all? As far accesories go ain't to worried all i need is an alt and power steering.