mr.rotaryrx7

After running for a while the idle drops to 2-300rpms and then will die out in neutral or when i push the clutch in. After wards it wont start. I tested it in my school shop and it was running rich then normal then lean and then rich again. I was told it could be the ignition problem or the crankshaft or a fuel promise. Help me out please!
Also it has a flooding problem..