The Comp Cams push rods are excellent for adjustable hydraulic lifter camshafts where precise push rod length is not critical. That is why Comp Hi-Tech push rods are available in choices of .050" length increments and the Hi-Energy push rods are only available in OE lengths as determined by the year and make of the engine.
However, if you must have exact push rod length such as with a solid lifter camshafts or with LS engines that have net-lash adjustment, Smith Brothers offers custom made .083" wall, 4130 chromemoly push rods any any length you need for about the same price as Comp Hi-Tech push rods. In addition to custom lengths, Smith Brothers push rods are available with .030" or .040" oil feed holes in the lifter end for oil flow restriction. Restriction of excessive oiling to the rocker arms is often required in most engines at high RPM, especially engines using solid lifters, but that is a different issue.