New from Nebraska

[Midwest4x4]

Name is Phil, working on a 1985 k10, started life as a 305/700r4/NP208 truck and I'm in the middle of swapping the motor out of my Impala into the rig and dropping a th350/NP205 tcase with it

 

[Driver4r]

SWEET, Its been lonely being basically the only Nebraska guy on here lol.

Jw, did you go to fremont today?

 

[Midwest4x4]

Nope, I was in Neola, Ia all day yesterday lol

 

[HotRodPC]

Welcome to GMSB. Great Swap Choice !!! I've considered the same swap in my 85 K1500. It also started out as a 305/700r4/NP208 and is now a 350/Th350/NP208. I've got the Th350/NP205 just haven't put it in. One thing that help me up was it came from an 80 model truck that had a 12 bolt rear axle, so although I know the front driveshaft will fit, I'm uncertain of the rear driveshaft working and mating with my 10 bolt rear axle. I don't know if the pinion lengths were the same and if the cup sizes on the U joint were the same.

 

[Midwest4x4]

I have a adapter plate to make the Th350 the "same length" as the 700r4 so I can use stock driveshafts... If I didn't have that the front shaft would be to long and the rear would be to short

 

[HotRodPC]

I have a adapter plate to make the Th350 the "same length" as the 700r4 so I can use stock driveshafts... If I didn't have that the front shaft would be to long and the rear would be to short

Yep, that's what I did too. I got the spacer off of a trans in Pull A Part for $5, then cut off a 2wd output shaft. Simple swap and I can go right back to a 700r4 if I ever choose too. I just wasn't sure if that same adapter worked on the NP205 too. Are NP205 and NP208 the same length with their adapters?

 

[Old77]

 

[bucket]

Howdy!

That spacer won't do you any good at all, because your output shaft will be too short. That spacer is only useful if you are putting an np205 behind a 700 r4, or putting a LONG tail th350 in place of a 700r4 AND retaining the np208. If bolting in a th350/np205 combo, you have to get the shafts modified, that's all there is to it.

...did you say Impala?

 

[Midwest4x4]

Yep 70 2 door hard top..

 

[bucket]

Yep 70 2 door hard top..

Really?! That's my favorite year, I have one too. So if you are taking the motor out of it, what are you putting in? Got pics?

 

[Midwest4x4]

Yep taking the motor out and dropping a LS 5.3 with a 4l60e trans

 

[bucket]

Yours a Sport Coupe or a Custom Coupe? Mine's a custom, always loved the concave rear window. I also have a '69 4-door hardtop.

 

[Midwest4x4]

Mines a custom, I started a work log in the "other rides" or whatever it's called lol

 

[Midwest4x4]

This picture is about 2 yrs old

 

[Midwest4x4]

I took this in march