[spencer_41188]

you can use a compression tester ... just take the valve stem core thats in it out and hook it up to compressed air and the air will hold the valves up as you compress the spring

i pen magnet will get the spring retainers and the valve spring will come off

i would go to an engine shop to get the valve seals because they come in alot of sizes and they can get you the right ones and there ushually cheaper then summit or jegs and when your there ash them what your getting yourself into they dont mind shairing knolage to do it your selvers

if your running solid lifters use a feeler gauge set the lash, if your running a cam use the specs on the cam if not ask the engine builder
if your running hydrolic lifters be shure to ask the engine builder how much preload to put on the lifter its gana be 1/2 turn to 1 turn from 0 lash