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Old 11-07-2017, 01:29 PM   #1
randy500
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Cummins swap, I know there is a search button but the info is burried in many threads

I'm going to swap a cummins in my 72 crew cab.

The donor is a 93 W350 single rear wheel truck.

I know the dana 60 front axle is just about a bolt in with axle pads 1/2" wider and a similar track width.
I would use the dana 70 rear for the matching 3.55 gears, does anyone know the WMS width?
I would use the stock dodge overdrive trans mated to the dodge NP 205, any known problems making this work?


This is the info I am requesting.


1. Any front 4wd Differential clearance problems, I have a 2" lift or so.
2. Will the engine fit with the radiator in the stock location without firewall mods?
3. I know the Cummins is heavy so I assume frame reinforcement side to side is necessary which would probably be done with the engine mounting but has anyone used the stock cradle to mount the cummins?

Can anyone point me to these problems in previous build threads along with any other obstacles?

I don't want the install to languish, I want a quick install and on the road.

Any help is appreciated!
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Old 11-07-2017, 07:52 PM   #2
Dieselwrencher
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Re: Cummins swap, I know there is a search button but the info is burried in many thr

Quote:
Originally Posted by randy500 View Post
I'm going to swap a cummins in my 72 crew cab.

The donor is a 93 W350 single rear wheel truck.

I know the dana 60 front axle is just about a bolt in with axle pads 1/2" wider and a similar track width.
Dodge D60 is about 2" narrower than a Chevy D60. also the Dodge D60 has 1/2" studs instead of 9/16 ones but you can put the 9/16 ones in your hubs with no mods. Get this bushing kit to make the dodge axle install easier into your chevy chassis.
http://offroaddesign.com/catalog/Dod...apBushings.htm
Here is a link to the D60 bible for more info on them
http://www.pirate4x4.com/tech/billavista/60_front/

I would use the dana 70 rear for the matching 3.55 gears, does anyone know the WMS width?
I would use the stock dodge overdrive trans mated to the dodge NP 205, any known problems making this work?

Your transmission should be an A518. Non lock up, overdrive trans. There is no problem with them being used. They don't get the mileage of a lock up 47rh but get the job done. Is your D70 an HD? I think the WMS on the HD is 66" but I can't remember for sure.
This is the info I am requesting.


1. Any front 4wd Differential clearance problems, I have a 2" lift or so.
A 2" lift will be close. The first gen oil pans have a little more angle on the sump area and tend to get real close to the pinion support web on the D60. You should be ok if you have 2" of lift.
2. Will the engine fit with the radiator in the stock location without firewall mods?
Yes, the engine will fit in there with the radiator in the stock location. I have a stock BBC brass radiator in my 72.
3. I know the Cummins is heavy so I assume frame reinforcement side to side is necessary which would probably be done with the engine mounting but has anyone used the stock cradle to mount the cummins?
If you are planning on using your K10 frame, yes, I would box it under the cab to at least the front leaf spring shackles. Some people have used the stock 1st gen dodge engine cradle but IMO it looks like poo. You're going to want to get poly replacement 1st gen mounts if you plan to use that style. The factory rubber ones don't last in stock form. If I were you and you want this to be a fast swap, call Dawna at Auto World in Montana and get their mount kit with cross member.
http://www.cumminsdieselrepowers.com...ion_Parts.html
Rob Bonney fab is another good source too.
I've just built my cross members on my chevy swaps. There are all kinds of pics online of people who have hacked the stock gas one and dropped them, but again, it looks hack IMO.

Can anyone point me to these problems in previous build threads along with any other obstacles?
Getting 4" exhaust up over the NP205 can be tight and close to the floor. Your front drive shaft will need lengthened more than likely. You can probably use the dodge rear shaft with a yoke change on your rear end.

I don't want the install to languish, I want a quick install and on the road.

Any help is appreciated!
Answers in blue above. If you have more questions, feel free to ask. Like you said, the info is spread out all over in different builds here. But it is here.
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1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread
1976 K30 CC SWB Build Thread

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Last edited by Dieselwrencher; 11-07-2017 at 08:11 PM.
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Old 11-07-2017, 09:56 PM   #3
randy500
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Re: Cummins swap, I know there is a search button but the info is burried in many thr

Dieselwrencher, thank you so much, very helpful.

Damn, $7-$900 for a crossmember is a lot...Its doable but...can you point me to how you made yours or other nice ones?

I will definitely use the spring shackles for mounting the front dana 60 if I do this.
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Old 11-07-2017, 11:07 PM   #4
Dieselwrencher
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Re: Cummins swap, I know there is a search button but the info is burried in many thr

http://chevymotormounts.us/rob_bonne...ing_sets_6.htm

Contact him to see if he has anything for 67-72s.

Here's a google search to show some pics. I can get you some of mine but they are buried in threads. Haha

https://www.google.com/search?rlz=1C....0.5bs1UjkYhPY
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1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread
1976 K30 CC SWB Build Thread

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Old 11-11-2017, 10:38 PM   #5
v30crewcab
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Re: Cummins swap, I know there is a search button but the info is burried in many thr

I used the factory chevy motor mounts, and made my own buckets to fit them out of 1/4 plate. then cut out the lower crossmember and made a new lower one out of square tube. if you can build a crewcab door, you can handle this!
I have 4" exhaust, and just had to dimple it some around the edge of the transfer case so it didn't rattle.
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http://67-72chevytrucks.com/vboard/s...d.php?t=522535
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Old 11-12-2017, 12:05 AM   #6
randy500
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Re: Cummins swap, I know there is a search button but the info is burried in many thr

Quote:
Originally Posted by v30crewcab View Post
I used the factory chevy motor mounts, and made my own buckets to fit them out of 1/4 plate. then cut out the lower crossmember and made a new lower one out of square tube. if you can build a crewcab door, you can handle this!
I have 4" exhaust, and just had to dimple it some around the edge of the transfer case so it didn't rattle.
Iím sure people have tried this before...the dodge crossmember appears to be removable, Iím gonna see how it fits in the chevy frame I guess. I looked at the donor truck today, I would have bought it but the banks were closed for Veterans Day.
Some things I noticed...
The trans and transfer case is very long, should give a pretty good front driveshaft angle.
The dodge radiator seems to be similar size to the chevy truck one and the inter cooler in front of it looks like it wonít be hard to mount in the chevy nose.
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Old 11-12-2017, 08:17 PM   #7
v30crewcab
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Re: Cummins swap, I know there is a search button but the info is burried in many thr

the dodge mounts can separate, the chevy ones are encapsulated. thats why I used those.
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