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Old 03-14-2004, 08:52 PM   #1
1969 GMC
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Rockwell to NP205 ?

hello everyone, it appears that my Rockwell T-221 just took a crap. Read here for the full story.

Anyway, I was thinking it would probably be cheaper and easier to just swap in an NP205. Right now I have an SM465 married to a Rockwell T-221. I did a search for this info, and discovered that I can use my existing crossmember, and the NP205 will bolt right up (if I get the NP205 coupler sleeve, of course), but I couldn't find specifics on any driveshaft mods. I'd like to ask if anyone has done this swap and has changed their driveshafts in any way. My truck is stock ride height now but I plan on a lift sometime in the future.

Oh, and I also know that unless I get a '70 NP205, I will have to cut a hole in my high hump for the shifter.

Thanks in advance
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Old 03-15-2004, 12:51 AM   #2
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ttt^
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Old 03-15-2004, 01:05 AM   #3
breeh
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Pont has done this swap. I am not sure but it seems like he said that he did have to change the driveshaft length. I would try e-mailing him and asking.
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Old 03-15-2004, 06:13 PM   #4
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ttt hopefully he will see this
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Old 03-15-2004, 06:32 PM   #5
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I'm pretty sure the rear driveshaft is the same but the front is different as I recall from memory.
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Currently on or near the homestead:

67 Chevy SWB 2WD stepside 350/3 on tree (Pat's)
67 GMC SWB 2WD Fleet 402/auto (Brian's under construction)
67 Chevy 3/4 ton 2WD 402/auto (Business Hauler)
67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC)
68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC)
70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC)
71 Chevy SWB stepside (Crushed by tree - parts donor)
72 Chevy 3/4 ton 4WD (Parts donor)
72 Chevy 3/4 ton 4WD Suburban (Parts Donor)
72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC)
81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler)
82 Camaro Z/28 355/Super T-10 (Pat's toy)
93 Caprice 9C1 (Brian's Cop Car)
02 Toyota Camry (Reliable but a souless steel and plastic hulk)
2011 2SS RS Camaro M6 Factory Hurst Shifter

Maybe I need to sell some of this crap

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Old 03-16-2004, 01:10 AM   #6
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ttt
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Old 03-16-2004, 11:16 AM   #7
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You have to get the 205 adapter that goes between the tranny and the t-case. I don't know about driveshafts, but I don't think that you need a new front. I'm not sure about the rear, the output on the rockwell is at the bottom, the output on the 205 is at the top.

After saying that, I've never done the swap, but someone did it on my '68 before I bought it.
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1968 K20 fleet
1969 K10 swb fleet
1972 K10 Suburban
1972 C10 lwb step
1992 K1500 'burb
1995 K2500 'burb
1997 C1500 'burb
1999 K1500
2000 K1500 'burb

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