(1) The two piece key is correct for your A model.(2) your best off the shelf choice for condenser is an Echlin RR 174.(3) The coil is either good enough or not there is no reason to try and dismantle it.To test coil using multi meter, put one meter lead on each spark plug wire tab on coil or if plug wires are good you can check by attaching lead to each plug wire end,and read resistance on 1K ohm scale.You should have reading around 8.
