Pushrods?

I just went thru this process last week. I bought two length-checking pushrods from Comp Cams...basically this is a fake pushrod that acts as a precision length gauge as its opened & closed. In the closed position, it's a determined length like 8.800" for example. Each revolution of the adjustment end equals .050". By installing the tool into position and using light tension checking springs, I can watch the roller tip on my rocker arms for the correct travel path accross the valve stem at base circle, mid lift and max lift. I started at stock BBC length, made adjustments till seeing the best contact pattern, then removed the tool and verified its length. I ordered the pushrods from Jeggie's and are awaiting delivery. This process, of course, assumes a one-piece pushrod which is an exact fit. Making your own is another story.