what shocks are Best? stock 72 K5.

[vectorit]

Can't go wrong with just the basic Rancho 5000 shock if you are not hard on the truck off road.

I run a cheap Rancho knock off in my Suburban, and they are fine to this day; I think I've had them on the burb for 15 years now.

The Bilstein 5100 is a premium shock, and cost 3 times what the basic Rancho shock goes for. I ran the 5100 Billy in my 1970 K10 SWB, and found that it was pretty stiff. Later I regretted getting them, when I should have just went with a basic type.