1980 K-10 Transmissions

Will the 700R-4 or 4L80-E O/D Transmission hook up the the original transfer case, mounts, are the transmissions the same length, & are there any clearance issues.
Oh yeah, what about all of the linkages.   Thanks, Dustin  

i don't know about the transfer case issues, BUT
the 700 should clear your floor pan and have plenty of room in the tunnel...
in 2wd application i had to slide the cross-member back 2-3 inches and drill new bolt holes in the frame...the 700r4 is three inches longer than the 350 and the 200-4r...again, 2wd app.    seems like i recently read an article on this type of swap and the writer said that the tail-shaft lengths were different between 2 & 4wd 700's due to having to mount to the transfer case

as far as the linkage...the same linkage will work...the only difference is if you currently have a three speed auto column shift, you won't be able to pull the 700 into first gear...depending on your rearend gearing, this may be a good thing...i learned the hard way after sending the motor into orbital rpms w/4.11 rear and 3.06 first in 700...

the 4L80 will require some type of electronic control were the 700 doesn't

hope you find something useful in all this  

Thanks you so much for the info. I will have to fugure out what both differential gear ratios are & go from there, may GOD bless yall, & have a safe Labor day weekend., Dustin