Kevin , you dont actually mention whether its Jesels, shaft system or not..
If it is they require a bit of setup time initially as Doc pointed out for geometry & pushrod length.. Use an adjustable pushrod to find the installed height @ the optimum lash adjustment screw setting first while checking for valve stem contact pattern, then order your pushrods for 'that' length. If you dont do this you may find that you dont have enough range in the adjustment screw/and or a stem contact pattern that causes guide wear.