There should be marks on your dampner and on the drivers side timing chain cover, so you shouldn't need timing tape. Start at 5 degrees before TDC (Top Dead Center) and go from there. If you can find a Motors Manual for the year of your engine/car, it will list the timing information in there. In my opinion, Chilton is a poor second to Motors, and Haynes sucks because the info is hard to find and is sometimes even missing. You can also go to a Chevy dealer and get the specs from them.
The more you advance the timing, the faster the engine will run until you reach a point where it is too much timing and it will begin to stumble and slow down. Moving the distributor CCW (Counter ClockWise) will advance the timing. Check timing with the vacuum hose removed from the distributor and plugged.
Total timing at 3,000 rpm should be no more than 34 degrees with todays lousy gas, if your timing light will work at that rpm.