6.0 NV4500 K30 swap

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Raybob9289

Full Access Member
Joined
Mar 3, 2021
Posts
59
Reaction score
104
Location
Littleton
First Name
Raybob
Truck Year
1977
Truck Model
Cheyenne 30
Engine Size
454
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Last summer was the put it on the correct frame and this winter its 6.0/ NV4500 swap on my 77 Cheyenne K30 dually.
I can't stand the 454 and SM465, can't get the truck out of the way of traffic.
BTW 104K mile 454 carb to pan for sale cheap.
I picked up a 90k mile 6.0 out of a 01 2500 suburban and an NV4500 out of a 96+ 3500. I figured Id do a thread on my project since I've followed a lot of you guys.
Won't be my 1st LS swap but my first inna truck. I did a 02 WS6 LS1 6sp swap last winter in my 87 IROC-Z.
I was gonna try and use the existing NP205 but waaaaaaaaaaay too much brain damage. So Im on the hunt for a 32spline NP241C. Or I'll do with a NP208.
I have a couple questions;
Does the SM465 clutch disc & pressure plate work with the hydraulic clutch NV4500?
And what's the real difference (good & bad) between the NP241C and the NP208??
and BTW, I'm definitely changing to hydraulic pedal. I just haven't decided which route.
Comments ?? Answers?? Reply away Dudes.
 

Raybob9289

Full Access Member
Joined
Mar 3, 2021
Posts
59
Reaction score
104
Location
Littleton
First Name
Raybob
Truck Year
1977
Truck Model
Cheyenne 30
Engine Size
454
205 works but leaks. I'm in Littleton, Colorado. I'll let you know when it out. You can come get it
 

AuroraGirl

Full Access Member
Joined
Sep 8, 2019
Posts
9,634
Reaction score
6,762
Location
Northern Wisconsin
First Name
Taylor
Truck Year
1978, 1980
Truck Model
K10, K25
Engine Size
400(?), 350
You must be registered for see images attach
You must be registered for see images attach

Last summer was the put it on the correct frame and this winter its 6.0/ NV4500 swap on my 77 Cheyenne K30 dually.
I can't stand the 454 and SM465, can't get the truck out of the way of traffic.
BTW 104K mile 454 carb to pan for sale cheap.
I picked up a 90k mile 6.0 out of a 01 2500 suburban and an NV4500 out of a 96+ 3500. I figured Id do a thread on my project since I've followed a lot of you guys.
Won't be my 1st LS swap but my first inna truck. I did a 02 WS6 LS1 6sp swap last winter in my 87 IROC-Z.
I was gonna try and use the existing NP205 but waaaaaaaaaaay too much brain damage. So Im on the hunt for a 32spline NP241C. Or I'll do with a NP208.
I have a couple questions;
Does the SM465 clutch disc & pressure plate work with the hydraulic clutch NV4500?
And what's the real difference (good & bad) between the NP241C and the NP208??
and BTW, I'm definitely changing to hydraulic pedal. I just haven't decided which route.
Comments ?? Answers?? Reply away Dudes.
To prevent PCV issues, buy the GM or dorman driver side valve cover, and put the revised PCV to work. Also, a catch can if you want to really keep the intake and runners and TB clean.

The Passenger side you should remove the valve cover, and remove the tab holding the Oil neck, then put the cap directly on the cover.

If you live in a cold climate, there is a oil fill cap with a vent that can be used to prevent oil burning in very cold weather.
 

AuroraGirl

Full Access Member
Joined
Sep 8, 2019
Posts
9,634
Reaction score
6,762
Location
Northern Wisconsin
First Name
Taylor
Truck Year
1978, 1980
Truck Model
K10, K25
Engine Size
400(?), 350
You must be registered for see images attach
You must be registered for see images attach

Last summer was the put it on the correct frame and this winter its 6.0/ NV4500 swap on my 77 Cheyenne K30 dually.
I can't stand the 454 and SM465, can't get the truck out of the way of traffic.
BTW 104K mile 454 carb to pan for sale cheap.
I picked up a 90k mile 6.0 out of a 01 2500 suburban and an NV4500 out of a 96+ 3500. I figured Id do a thread on my project since I've followed a lot of you guys.
Won't be my 1st LS swap but my first inna truck. I did a 02 WS6 LS1 6sp swap last winter in my 87 IROC-Z.
I was gonna try and use the existing NP205 but waaaaaaaaaaay too much brain damage. So Im on the hunt for a 32spline NP241C. Or I'll do with a NP208.
I have a couple questions;
Does the SM465 clutch disc & pressure plate work with the hydraulic clutch NV4500?
And what's the real difference (good & bad) between the NP241C and the NP208??
and BTW, I'm definitely changing to hydraulic pedal. I just haven't decided which route.
Comments ?? Answers?? Reply away Dudes.

If you want a transfer case that will work with very little extra, the np261 or np263 (electrical version of the same one as the np261) with a upgraded rear case half OR a case saver installed in the magnesium rear is a direct intended tcase for your 6.0 in the gmt800 from a couple years newer, not sure about inputs but youd need to have the opposite side drop as the square. And the front axle would likely have to be 9.5aam unless the case maybe can be used with a old locker-style axle? Im not sure if its able to since the gmt800 actuates the axle to engage when you select 4wd. The 9.5 aam front axle would give you slip on rotors and nice dual piston brakes, but this would require changing master cylinders and such. Just an idea.

I did a quick google, an era similar Dana 44 or Dana 60 front axle from a ford should work. the few places I googled suggest the Np261 (manual lever, if it wasnt clear) will work with those.

That would retain your brakes setup with similar sized stuff.

The Np261HD and NP261UHD are both good and beefy, the UHD is out of 3500 trucks, has a thicker chain and is quite stout. The HD is 2500
 

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