1981 K10 stepside short bed TH350 NP208 Which adapter?

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keithpk

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keith
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1981
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k10
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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

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400(?), 350
if those are both for a th350 and np208 then the adapter height is prob difference(crossmember may be important)
 

keithpk

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

AuroraGirl

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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

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k10
Engine Size
5.7
Thank you, I will further research.
 

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