? For the Forum on Adjustable Pushrods

The old Mopar power books called for adjustable pushrods. They were fine at the time. IMO - times change and I wouldn't run them. Too much of a problem with weight and potential failure points especially given any real RPM (aka not Harleys...lol). But some builders might still think they're good and in the case of some early hemis they are mandatory. Again - they were never meant for high rpms and big spring loads though.

To the OP - you can use them. if you have a hydraulic cam you would be best served to tell us what you have for a cam and lifters. If you don't know, then start with a preload figure of .020" measured between the plunger of the lifter and the plunger retaining clip )intake must be off for this). If it's a solid lifter camshaft, I would start with lash of .025" as measured between the rocker tip and valve stem tip.