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Author Topic: 700R4/NP205 SWAP  (Read 4320 times)

Offline 76_Scottsdale

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700R4/NP205 SWAP
« on: June 06, 2007, 12:06:16 pm »
I'm thinking of swapping in a 700R4 into my '76 K20. I've heard that both a shorter output shaft and an adapter plate can be used, and since I will be rebuilding the tranny anyways, I am going to use the shorter output shaft. The only other problem is that my NP205 is currently mated to a SM465. I need to know exactly what power sleeve I must change in my NP205 to make it work and if it is very easy. If it's not, then I will just trade my NP205 for one that was mated to a TH350. I know that I will have to move the crossmember, lenthen/shorten driveshafts, and run cooling lines, but are there any other large obstacles to this swap?

Thanks Again.
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1976 Scottsdale K20
350 C.I.D.
700R4
NP205
2 1/2" Lift
305/70/R16 BFG MT
True Dual 3" Flowmaster 40 Series Exhaust

Offline VileZambonie

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Re: 700R4/NP205 SWAP
« Reply #1 on: June 06, 2007, 08:46:07 pm »
why not just put in a 700R4 -NP208?
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline 76_Scottsdale

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Re: 700R4/NP205 SWAP
« Reply #2 on: June 06, 2007, 09:21:23 pm »
Not a big fan of the chain drive and wimpy aluminum case.
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1976 Scottsdale K20
350 C.I.D.
700R4
NP205
2 1/2" Lift
305/70/R16 BFG MT
True Dual 3" Flowmaster 40 Series Exhaust

Offline aort07

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Re: 700R4/NP205 SWAP
« Reply #3 on: June 12, 2007, 04:33:36 pm »
www.advanceadapters.com Will have the shaft you need. I did the exact same swap in my truck. The  shaft will have a female 10 spline on it ready to mate to your 205.
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