Now the valvetrain.... Arghhhh!!!

you can get the push rods from Comp they make a ball and cup set up. Check the tech archive there is an article in there for preload on HI lifters I runn solid so :?: , you will also need an adjustable push rod gauge to get the size it looks like a rod but is threaded so that you can adjust it to get the right lift and then measure it. Comp also has those.