4340 Chrome-Moly replacement axle for Dana 44, '75-'79 Ford F250, LH inner, 30 spl, uses 5-760X u/joint. 18.62 long. Product Features:Fits 1974-1979 Ford F250 front with Dana Spicer 444340 ChromolyLeft hand side inner30 spline18.62 from end of splines to center of u-joint bore