Down the road planning vortec/4l80 swap

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

usar17

Full Access Member
Joined
May 3, 2012
Posts
596
Reaction score
17
Location
PA
First Name
Shawn
Truck Year
1985/87
Truck Model
K20 Silverado
Engine Size
TBI350/700r4/NP208
So...lol I currently have the wiring and drivetrain of a stock 1994 TBI 350/4L60e with a 1991 burb NP241C for driver drop and electric speed sensor.

Looking to improve again. If I bought a late 90s k2500 for parts: wiring, motor, 4L80e...what else do I need? Reusing my 241.

-I'd assume a new drive shaft built.
-Engine and/or trans crossmember need changed?
-AC hoses obviously
-any altered or added sensors?
-will steering column shifter still mate?
-assume a transfer case adapter


Thanks.

Sent from my SM-G950U using Tapatalk
 

usar17

Full Access Member
Joined
May 3, 2012
Posts
596
Reaction score
17
Location
PA
First Name
Shawn
Truck Year
1985/87
Truck Model
K20 Silverado
Engine Size
TBI350/700r4/NP208
Or at this point will it be the same effort to do a 5.3L LS swap with a 4L80E? I feel the early vortec would be a little simpler.

Lol also debating switching to manual and grabbing a nv4500. I'm currently so indecisive on what to do next.

Looking to make my truck a little more DD friendly. Largest thing I regularly tow is a my 24' pontoon boat.

Sent from my SM-G950U using Tapatalk
 
Last edited:

4WDKC

Full Access Member
Joined
Jan 27, 2016
Posts
2,366
Reaction score
1,090
Location
Southern Florida
First Name
Kacy
Truck Year
1987
Truck Model
V10
Engine Size
350
Easier yeah but gains are minimal, do the 5.3/6.0 with the 4l80, you will need a 241 with 32 splines to match the 80 or you will need to swap out your input on the t case. Same for the 4500.
 

usar17

Full Access Member
Joined
May 3, 2012
Posts
596
Reaction score
17
Location
PA
First Name
Shawn
Truck Year
1985/87
Truck Model
K20 Silverado
Engine Size
TBI350/700r4/NP208
I know LS system needs higher fuel pressure. What about the early vortec?
 
Last edited:

Frankenchevy

Proverbs 16:18
Joined
Jan 3, 2018
Posts
5,963
Reaction score
7,419
Location
USA
First Name
Jeremy
Truck Year
Square
Truck Model
CUCV
Engine Size
Small
If by vortec you mean 96-99 spider type... they need around 60 psi
 

yevgenievich

Full Access Member
Joined
Mar 1, 2014
Posts
4,789
Reaction score
3,327
Location
Texas
First Name
Viktor
Truck Year
sad
Truck Model
very sad
Engine Size
less sad
About some trouble for either set up. 6.0 or 8.1 would be preferred for me
 

Latest posts

Forum statistics

Threads
42,127
Posts
909,700
Members
33,620
Latest member
JoshuOne
Top