Re: 6? K10
If the truck you looked at had a 250 inline 6, then your 350 will bolt up just fine to the sm420. If it had a 292 inline 6, you'll have to change out the passenger side frame stand that sat further forward on the frame.
I haven't messed with the 4wd trucks, but if you take the transmission and transfer case mounts from your 71, my guess is it would probably be fairly easy to swap out the entire drivetrain
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Christian Carpenter
1963 C10 - Frankentruck 283, Muncie 3 speed with overdrive Overdrive wiring here 1963-ish truck bed trailer - Half-Wit
1981 C10 - Penny 305, th350 --> Soon to be 350, Saginaw 4 speed
1995 Dodge Dakota Sport
"I'll put it simple: if you're going hard enough left, you'll find yourself turning right." - Doc Hudson
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