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Old 02-09-2010, 09:16 PM   #1 (permalink)
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have a few queations on a 70s ford cummins swap.

now just to begin with i dont have any of the parts or even a truck to do the swap with. this is more of a feeler thread. but any way so what im thinking of doing is swaping a cummins into a late 70s ford truck. but for those who did this already did you use the ford trans or the dodge trans. if you used the dodge trans how hard was it to make mounts for the dodge trans. and how did you get the lines for the hydros to work if it was a stick trans. and then the brakes. did you have to add any thing to convert the factory brakes to work with the diesel engine?
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Old 02-11-2010, 02:20 PM   #2 (permalink)
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In my conversion I stuck with the dodge nv4500. It's a good stout trans and eliminates the need for an $800 adapter and $625 flex plate. I used the dodge clutch master and slave cylinder. When mounting the master cylinder you have to reinforce the firewall. The trans mount was easy. I used the stock ford C6 mount and slid it back around 6 inches and recessed the mount about an inch. The 12v motor I used has a vacuum pump to run the brakes, but I'm planning on a hydroboost conversion in the future.
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Old 02-11-2010, 09:10 PM   #3 (permalink)
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In my conversion I stuck with the dodge nv4500. It's a good stout trans and eliminates the need for an $800 adapter and $625 flex plate. I used the dodge clutch master and slave cylinder. When mounting the master cylinder you have to reinforce the firewall. The trans mount was easy. I used the stock ford C6 mount and slid it back around 6 inches and recessed the mount about an inch. The 12v motor I used has a vacuum pump to run the brakes, but I'm planning on a hydroboost conversion in the future.
ok so over all how hard was the conversion. im not the greatest mechanic in the world. but this would be a huge learing experance.
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Old 02-11-2010, 09:57 PM   #4 (permalink)
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It's an easy swap,if you have 2 trucks to work with. all you need is a cutting torch, a welder, basic hand tools and an imagination. a 3" body lift on the ford makes it easier too. I started my swap on a friday morning and was driving it sunday evening.
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Old 02-12-2010, 12:29 AM   #5 (permalink)
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Well to start with I bought a '90 W-250 with the non I/C and a Getrag 360. My conversion is a little diffrent than most in that I used 2 transfer cases, the Dodge married unit and a Ford divorced unit both being NP205's. I used the Dodge slave cylinder and kept the Ford master I had on the truck alrerady from my 460. I fabed a transmission crossmember and motor mount perches. Had to trim a little out of the crossmember under the oil pan. I converted to hydroboost because I needed better brakes as I am running 38's. Wow is all I can say! Love the Hydoboost!
If you ask around on here you will get all the help you need. I was a little worried myself but with a few questions answered it got a lot easier to do the conversion. Feel free to pm me if you need more details I'd be glad to help.
This might give you an idea of what I did '79 F-250 conversion questions I hope this helps you.
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Old 02-12-2010, 02:40 PM   #6 (permalink)
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now when i ago about buying the ford should i only get a f250 or dosent it matter. or do you have to reenforce the frame no matter what size truck?
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Old 02-12-2010, 03:06 PM   #7 (permalink)
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I would make sure to get a dana 60 front end. the cummins is about 300 pounds heavier than a big block ford. I dont think a dana 44 will last very long.
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Old 02-12-2010, 04:00 PM   #8 (permalink)
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I would make sure to get a dana 60 front end. the cummins is about 300 pounds heavier than a big block ford. I dont think a dana 44 will last very long.
i do understand that a cummins is an 1100lb motor but my concern is that is the frame gona bend down over time cause of the weight or even twist the frame from torque?
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93 w250,6in lift 35x13.50 ddp fuel pin, hx35/40, maxed pump, airdog 165,procomp traction bars, boost pyro, cooler tubz. currently apart for compounds, o ringed head, port polish, and sdx 5x16
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Old 02-13-2010, 10:17 AM   #9 (permalink)
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I dont think you have to worry about the frame.I've naver seen one bent, cracked or twisted unless it hit something.
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