I have the MSD 6A box PN 6201. The instructions say nothing about installing this ignition box on a LT car. I have the stock PCM and wiring harness. MSD opti, Msd wires, Accel coil. I am installing my new 396 motor soon and I need help installing this box. I'm no electrical guru so use simple terms please. Thanks!

 

Don't use it unless boosted or sprayed.

 

MSD makes a plug and play harness to connect it, but it varies by the year/style of coil. You didn't provide that info.