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Generation 6 1973-1979 F100, F150, F250, F350

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  #1  
Old 10-08-2019, 06:32 PM
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engine swap

i have a 78 1/2 ton with a 400 c6 9" my ? is it roesnt seem very strong im trying to pull a 7300 pound camper ive got a possibility of a a 460 with a c6 out of a camper how much trouble is it to install it but also have a 94 5.8 set up would it be easier and more economical to do the 5.8

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  #2  
Old 10-08-2019, 08:11 PM
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I'm not an expert but I think the 400 and 351 (5.8) are from the same engine family so you are more likely to not have to deal with things like motor mounts, etc if you go with the 5.8.

Hope this helps.
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Old 10-08-2019, 08:16 PM
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ya i think they are but my 94 5.8 needs a rebuild at 220k the 460 only has like 60k

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Old 10-08-2019, 09:09 PM
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Either way it's gonna be some fun research to figure it out

Besides motor mounts I'm not sure what all else you would need to figure out. Probably radiator hoses, fan shroud? Also need to check the bell housing bolt pattern as the 400 used the same large bolt pattern as the 460 but the 351 used the smaller bell housing bolt pattern.

Hopefully someone who is familiar with these swaps can chime in.
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Old 10-08-2019, 09:12 PM
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460 trades with the trans, not certain on the motor mount towers. To use the 5.8 you need both motor mount towers and transmission. Also would be considerably lighter on the front, so the springs would be a bit too strong to keep the alignment right.
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Old 10-08-2019, 09:34 PM
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wish i grew up around the ford trucks be alot easier but my made me smarter on trucks 20yrs ago

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Old 10-09-2019, 06:38 AM
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The 400 is a m motor, the 5.8 is a w. the bell housing etc is not the same. There was a 351 M, and a 351 Cleveland back when that truck was made, but the 94 motor is not from that family
even though both are small blocks they are both different, and are not interchangeable.
If I were to go with a torque motor to pull weight, it would be the 460.You will still need the 460 trans, driveshaft, etc.
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Old 10-17-2019, 02:34 AM
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1973/79 F100/350 460:

D3TZ-6028-A Right & D3TZ-6029-A Left .. Engine Supports aka towers/stands/perches / Obsolete

D3TZ-6030-A
Right & D3TZ-6031-A Left .. Brackets / Obsolete

The brackets bolt to the block, the rubber insulators bolt to the brackets, then to the engine supports.

D3TZ-6038-A .. Right/Left Rubber Insulators / Obsolete

Note: Passenger Car & Econoline 460 engine mounting parts will not work on F100/350.

A/T = Converter Housing // M/T = Bell Housing

The C6 converter housing is made as part of the transmission case.
---------------------------------------------------------------------------
351M/400: 1977/79 F100/350 // 1978/82 Bronco // 1980/82 F150/350.

351W: 1975/97 Econoline // 1981/96 F150/350 & Bronco // 1997 F250 H/D & F350.

Same engine supports aka towers/stands/perches: 1969/79 F100 302 / 1975/79 F150 302 / 1977/79 F100/350 351M/400 2WD
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Last edited by BKW; 10-17-2019 at 02:55 AM.
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Old 10-17-2019, 11:23 AM
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BKW. so then no parts are available to do this swap or is there a web site to ck out my other ford buddy at home doesnt know what or how to do this swap

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Old Yesterday, 06:15 PM
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There are some places that may have what you need. Maybe look at at LMCTruck and Dennis Carpenter. Landlproducts.com also has options for our trucks as well.

Hope this helps!
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