Like ruppstang I've often just used a distributor shaft attached to a good drill. Also have used a small tank (maybe 12 inches around and about 10 tall) that has a short hose to attach to the sender hook up, a air fitting and a shut off. Fill it mostly with oil and some air. Attach it too the engine and open the valve a little till you get oil flowing everywhere. Worked for my grand father in his garage down town for decades.