They look great, ride great, arrived quickly but Biltein let me down. I always buy Bilstein and have never had any problems. They are sold for a 4" lifter, but they limit travel at full extension, while the shocks are too long for a 6" lifter and don't break enough. Since none of the shocks have an internal baffle or travel limiter, I went with these shorter ones. My 1977 Chevy K-10 has a 4 inch spring adjuster from Tuff Country. Full extension of the front suspension is 23 inches, fully folded - 14.5 inches. These shocks measure 21.62 inches when fully extended and 13.66 inches when fully retracted.