Rockwell T221 to NP 205 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Donald Clemens · 07-04-2008, 07:27 PM

I am a long time owner of a 1968 GMC K2500. Since 1970. Recently I broke the coupler (sleeve) between the SM465 and the Rockwell T221. It stripped out on the Rockwell side. I am in the process of installing an NP205. I have installed the NP205 to SM465 adapter and moved the supporting crossmember. It moved back about 2.5 inches. My intention is to temporarily install the NP205 to locate the holes for the flexible side mount to the frame. Is there any other way to locate this mount and drill the new holes? I also assume the driveshafts will need to be lengthened (front) and shortened (rear) and the shift lever for the NP205 will require a new hole in the floor panel. If anyone has done this swap I would sure appreciate hearing from you.

Thanks

**Yukon Jack** · 07-05-2008, 01:00 PM

I can't think of a way to do it and be sure you have the holes in the right place without installing the t/c.

I'm also in the middle of doing this swap, if I could find more free time to get moving on this I sure would be happy.

Donald Clemens · 07-05-2008, 06:33 PM

Thanks Yukon Jack
I am going to attempt the install on Tuesday with the help of a neighbor. I'll let you know how it goes.

07-04-2008, 07:27 PM	#1
Donald Clemens Registered User Join Date: Jun 2008 Location: Evergreen, CO Posts: 9	Rockwell T221 to NP 205 I am a long time owner of a 1968 GMC K2500. Since 1970. Recently I broke the coupler (sleeve) between the SM465 and the Rockwell T221. It stripped out on the Rockwell side. I am in the process of installing an NP205. I have installed the NP205 to SM465 adapter and moved the supporting crossmember. It moved back about 2.5 inches. My intention is to temporarily install the NP205 to locate the holes for the flexible side mount to the frame. Is there any other way to locate this mount and drill the new holes? I also assume the driveshafts will need to be lengthened (front) and shortened (rear) and the shift lever for the NP205 will require a new hole in the floor panel. If anyone has done this swap I would sure appreciate hearing from you. Thanks

07-05-2008, 01:00 PM	#2
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,683	Re: Rockwell T221 to NP 205 I can't think of a way to do it and be sure you have the holes in the right place without installing the t/c. I'm also in the middle of doing this swap, if I could find more free time to get moving on this I sure would be happy. __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

07-05-2008, 06:33 PM	#3
Donald Clemens Registered User Join Date: Jun 2008 Location: Evergreen, CO Posts: 9	Re: Rockwell T221 to NP 205 Thanks Yukon Jack I am going to attempt the install on Tuesday with the help of a neighbor. I'll let you know how it goes.



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