Old fashioned trouble shooting for points ignition:

1) Pull a plug lead from a plug. Attach a spare plug and lay this on the engine block or head. You should see a spark. If not, go to 2. If you do, pull all the spark plugs and look for problems here.

2) Pull the king lead from the distributor and hold it near (1/4 inch)the engine block while you crank the engine (use something to insultate you from the HT). If you see a spark, suspect your new rotor. Less likely is the cap. Else go to 3

3) Use an analogue volt meter to measure the LT supply to the coil. This should pulse when you crank the engine. If not, suspect your new points, or a lost connection in the LT circuit.

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Cheers, Neil