85 K20, TH400 to SM465 swap

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Steveoh

Junior Member
Joined
Mar 5, 2022
Posts
3
Reaction score
2
Location
NJ
First Name
Steve
Truck Year
1985
Truck Model
K20
Engine Size
350
Swapping stock TH400 to (pretty certain is an) SM465 from an 87 K20. Are there any resources or procedure documents to help with this? I have all the juice clutch goodies, a fresh cut flywheel, sparkled up the bell housing, cleaned the trans, bought some seals and gaskets . . .

What I am most interest in is I have an NP205, and stock crossmember, do I need a different one, will the rear and / or front drive shafts need work because the auto trans is a different length than the manual?

I did attempt to search the database of posts, and went through 15 pages of them, then changed search terms, but got frustrated. :)

Thanks! Steve
(it was a brush truck for a Missouri Fire Department, it is my daily)


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