Does anyone know FOR SURE what ignitions are a direct swap/bolt on for a '73 Yamaha MX360? The stock ignitions were terrible and unreliable, as I can attest to. I've been told a '79 YZ400 will but they're impossible to find. Also was told a '75 DT250 will but apparently some are points ignitions and some are CDI ignitions. I don't mind switching the unreliable pulser coil & CDI ignition for a points ignition, I just want to make sure it fits before I buy it from some salvage yard in Pennsylvania or Michigan and have it shipped to me, only to find that it won't fit. PVL systems are available but are 500 dollars after shipping. Any help is appreciated. Thanks.