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Old 12-19-2010, 08:40 PM   #1 (permalink)
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1985 Chevy Cummins Crew Cab 4x4

Well after a lot of reading on this site I sold my TPI 330hp350 small block and bought a 1993 cummins, auto tranny, tcase, radiator, and intercooler cant wait to get this thing up and running!!!!!!!Attachment 30266

Attachment 30267

Attachment 30268

Last edited by whitee; 01-08-2011 at 10:43 PM.
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Old 12-20-2010, 12:33 PM   #2 (permalink)
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lots of work ahead and some modifications needed.

which engine mounts are you using and are you going to modify your stock crossmember or build/buy a different one?
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87 chevy crew cab long bed dually pickup on a 6" lift and 35"s thats getting a 12 valve cummins and a nv4500
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Old 12-20-2010, 08:37 PM   #3 (permalink)
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K30 I am using the 93 cummins mounts I took my stock crossmember out and I am making one this week
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Old 12-20-2010, 10:46 PM   #4 (permalink)
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if you fab up the motor mounts low enough you can set the engine in there without having to modify the firewall, i had to notch the front crossmember about 1" down and 6" across for the harmonic balancer. the other big fitment issue is the ac box on the firewall, you could modify the box by cutting into it or you could flip the exhaust manifold over. mounts the turbo up higher providing plenty of clearance and should clear the hood as well. the latter option does require a slightly sharper bend to the exhaust down pipe for firewall clearance.
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87 chevy crew cab long bed dually pickup on a 6" lift and 35"s thats getting a 12 valve cummins and a nv4500
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Old 01-24-2011, 05:28 PM   #5 (permalink)
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Do you guys have any pictures of your swap? I am thinking of buying a 70's or 80's crew cab and doing a cummins swap. . . and selling my first gen

Want to use a first gen motor though haha.
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1992 excab 4x4 manual (nv4500) 4 inch exhaust. 280k.
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Old 01-24-2011, 11:53 PM   #6 (permalink)
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I have a shytload of pics my swap is almost done but cant get the pics small enough for this forum
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Old 01-25-2011, 12:02 AM   #7 (permalink)
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pics Pictures by jeepetr - Photobucket
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Old 01-25-2011, 12:10 AM   #8 (permalink)
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yours is an 85? do you know what year they changed from the earlier body like the late 70's crewcabs? looking to do a chevy, but heard that the 80's style was an easier swap.
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1992 excab 4x4 manual (nv4500) 4 inch exhaust. 280k.
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Old 01-25-2011, 12:13 AM   #9 (permalink)
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Hey Whitee, what did you use on your firewall there?
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1992 excab 4x4 manual (nv4500) 4 inch exhaust. 280k.
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Old 01-25-2011, 08:07 AM   #10 (permalink)
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Mine is a 85 they are the same from 81-89 an 73-80 I used some sound deadening material on the firewall inside and out
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Old 01-25-2011, 04:19 PM   #11 (permalink)
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Sweet man, thanks for the info. Awesome looking truck by the way.

What sound deadening material did you use? Just curious, I used fatmat in my first gen and it worked well, but wondering what others are using and if it is more cost effective. . . I cant see a name printed on it at all or anything.
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1992 excab 4x4 manual (nv4500) 4 inch exhaust. 280k.
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Old 01-25-2011, 04:58 PM   #12 (permalink)
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You are using the stock axles? What make/model are they? What's the gear ratio?

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