Bring number 1 cylinder to TDC on the compression stroke, then move the timing mark to about 20 degrees before TDC by rotating the engine backwards. Drop the distributor in, aligning the rotor with the number 1 terminal on the cap. Turn the key on, but do not crank or start the engine. Place a spark plug in the end of the number 1 spark plug wire, grounding the body, make sure the coil wire is in the cap. Now, rotate the distributor in the advance direction, and make sure a spark occurs at the plug in the end of the wire. Do this 3-4 times to make sure you have it right. Turn everything off, hook everything up, then try starting it. It should be spark timed well enough to start and idle, and you should be able to set the timing to about 12 BTDC at 700 RPM or so, and it should run fine. If it doesn't, you have a vacuum leak, a wiring problem, or a carburetor problem.