Converting 1/2 ton 75 chevy scottsdale from 2x4 to 4x4

[75chevyeyesore]

I have a 75 chevy scotsdale c10 2x4 with a manual trans, with a front end problem. I have a mid 70's k5 blazer with no motor but good auto trans, transfer case, axles, everything. Originally i was gonna drop the 350 from the scottsdale into the blazer but i cant get it leagal due to title issues.
Is it possible and what would be involved in converting the scottsdale to 4x4. Or would it be possible or easier to switch body's with frames. Any suggestions or comments. please help.