For Thomas and El Viejo, when you install new lifters, even with an old cam, it's a good idea to coat the base of each lifter with assembly lube after you've soaked it in engine oil to fill it up (if it's a hydraulic lifter) and the first time you fire the engine with new lifters, run it up to 2500 rpm for 20 minutes to mate the lifter bases with the cam lobes. It doesn't hurt any to fill the engine oil galleys by rotating the oil pump by hand until you get oil pressure up before you start the engine either. Yeah, you have to pull the distributor to do that.
