Help please

[mikec801]

71 C20 long bed charging system issues please help. I went from driving the truck to needing a jump. I replace the battery voltage regulator and put a 12 SI Remy Delco upgrade in wiring was a mess and I pretty much got it back to where it should be. But I've blown to voltage regulators and now the 12 SI. (think it's a12 bought it used) why. The schematic shown on the threads are close to mine but a couple discrepancies one being the harness for my rear lights light green shows a loop or two coming out I only have one