1981 K10 stepside short bed TH350 NP208 Which adapter?

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.

keithpk

Junior Member
Joined
Mar 27, 2022
Posts
3
Reaction score
0
Location
phoenix
First Name
keith
Truck Year
1981
Truck Model
k10
Engine Size
5.7
Hello,
I have a 1981 k10 with an TH350 and an NP208. Which adaptor does this truck require..a 14020853 or a 14030853?

Thanks in advance,

Keith
 

AuroraGirl

Full Access Member
Joined
Sep 8, 2019
Posts
9,121
Reaction score
6,037
Location
Northern Wisconsin
First Name
Taylor
Truck Year
1978, 1980
Truck Model
K10, K25
Engine Size
400(?), 350
if those are both for a th350 and np208 then the adapter height is prob difference(crossmember may be important)
 

keithpk

Junior Member
Joined
Mar 27, 2022
Posts
3
Reaction score
0
Location
phoenix
First Name
keith
Truck Year
1981
Truck Model
k10
Engine Size
5.7
You must be registered for see images attach
You must be registered for see images attach


One is wider than the other. Both have same height.
 

AuroraGirl

Full Access Member
Joined
Sep 8, 2019
Posts
9,121
Reaction score
6,037
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


One is wider than the other. Both have same height.
One looks like a short foot and one looks like a long foot. However, my quick research says that the narrow one is likely for the 700r4 and the th350 uses the wider one because of shaft length reasons. The bolt pattern should be the same presumably, the reason for the adapter offset/stuff is probably to retain the same crossmember design and keep things simple since th350 only used 2 years with np208

dont take me as gospel, i literally just read this info but the search for th350 np208 adapters shows me the wide one.
 

keithpk

Junior Member
Joined
Mar 27, 2022
Posts
3
Reaction score
0
Location
phoenix
First Name
keith
Truck Year
1981
Truck Model
k10
Engine Size
5.7
Thank you, I will further research.
 

Forum statistics

Threads
41,848
Posts
903,423
Members
33,362
Latest member
Dhatch84
Top