I picked up a complete HEI for my 350, Used $35.00. My question is on the cap is a plug for wire from battery and tach. Power from battery? Does it come directly from battery or should it be from fuse box. Does it have to be hot all the time with a full 12 volts? ( I assume it does). I dont have tach yet so no problem there. Can you buy the plug at a parts store that fits the distributor cap? I am planning on changing the module, new plug wires, and plugs, then getting it running before I put on an accel super coil, or MSD coil on top. Any advice? I would rather stay away form seperate coil due to money issues. Thanks.