If you didn't pull the distributor it should be no problem, if so just drop it in with the rotor pointing to number position on the cap or close to it after finding TDC. I use a compression tester to find TDC so I can click it over and watch, or get a helper, but your finger will work fine doing it that way by yourself if you have really long arms.
After I find top dead center on the number one piston I rotate the engine slightly by hand so the balancer timing mark is on the specified timing setting on the tab. I then hook up a timing light to number one wire, turn on the ignition and rotate the distributor until the light flashes, turn off the ignition then tighten down the distributor. I never tried this technique with HEI though.
Allan