What Bob and BadDawg said! Once you find the ones you need, grab a little NoteBook and toss it up in the top of your tool box for reference. Whatever your parts that you need, write down that part#, because 4 or 5 years down the road, you'll be needing them. Especially seals and bearings....without those #'s, your up the creek so-to-speak.
After I get a motor tuned on the dyno, I issue a dyno sheet, but, I had index cards on each motor stating Plugs, Valve lash, temp., humidity, oil wt., type of coolant, air temp and motor temp, altitude. That way I know everything....but on my own personal cars, I have a fat little notebook with the part #'s in them. I even keep a copy of all my plugs, hoses, belts, bulbs, etc., in my wallet, for each car....that way, I don't need to carry the old greasey, tore up stuff with me....
Also, make sure the lower hose has a support spring in it, I've seen some motors collapse that lower radiator hose. The older hoses that are universal have a accordian appearance to them....(they usually don't need a spring, but the newer, lighter straighter ones have them)....they are old school. The boys that they have in the parts stores now don't know to check them (for support springs), some of them CAN be pulled out....