transmission swap

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chevy2011

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Feb 5, 2014
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Location
Little Rock
First Name
Guy
Truck Year
1979
Truck Model
K10
Engine Size
350
I have a 1979 4x4 K10 custom deluxe with 350 motor and 3 speed column shift and NP205 transfer case. I wanted to swap 3 speed for a SM465. Will this be a direct bolt up or what parts mite I need? will this require drive shaft work? Thanks for any information.
 

bucket

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Usually not in Ohio
First Name
Andy
Truck Year
'77, '78, '79, '84, '88
Truck Model
K5 thru K30
Engine Size
350-454
It depends on what trans you have now. If you currently have a th350, you need an SM465 with a 10 spline output, along with an sm465/np205 "figure 8" pattern adapter, and also the 10 spline coupler sleeve. Your np205 would also need a 10 spline input installed. Driveshafts should be the correct length. Likely easier just to by the entire trans/t-case combo and sell what you have now (tends to be more valuable too).

And that's assuming you currently have a th350.
 

highdesertrange

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Location
kalifornia
First Name
mike
Truck Year
1978
Truck Model
k30
Engine Size
454
boy I am stumped on this one. the trans will bolt right up to the bell housing, I think. after that I don't know. I have never done this conversion. let us know what you come up with. highdesertranger
 

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