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Re: 71 K10 3 speed upgrade issues
When my only experience with 3spd 4wds was a Blazer, I thought the Dana 20 case came behind all 3spds. But, I got a '71 K/10 SWB and that had a NP205. After looking around, I think it's only K/5s that used the Dana20? Anyway, we need to know what you have, first. I am not sure, but I think I checked around and the NP205 adapters are different between the 4spd and 3spd...maybe the shaft length?
I think the easiest and cheapest solution here would be get a NP208 with adapter to use behind either your TH350 or that 700r4. You could also find a complete trans/transfer case combo for a reasonable price. To use a 700r4/NP208 combo there is no adapter required and you just mover the engine forward to the 6 cyl location to make up for the longer 700r4, no driveshaft work required
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed"
GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project)
GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling)
Tim
"Don't call me a redneck. I'm a rough cut country gentleman"
R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~
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