Interesting that Dan's link to the 1970 Blazer shows a "C10 Series K/5 Blazer" as 2WD and a "K10 Series K/5 Blazer" as 4WD. Kind of weird, IMO. There was never a C20 or K20 (3/4 ton) Blazer, though. The driveline was shared by the C10 and K10 pickups, only with shorter driveshafts. I had a 72 K10 pickup that had a bent rear axle housing and I got a replacement from a 4WD Blazer.


Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.