I’m running a KMJ 250 as well without any issues. I did the big wire upgrade he sells with it. I didn’t cut any wires but just ran the power wire directly on top of the old stock one. Other than that I just followed the instructions he included for the grounds.Yes, I did the same. Didn’t install the stock wire. You have to cut the green wire where the alternator wire hooks to fuse box. Put an eyelet on the green wire and put it on the fuse box stud.
Ran 0/1 gauge welding wire from the alternator to the front of the car and looped it behind the battery, added a 300 amp circuit breaker and then ran 0/1 from that to the fuse box stud. Way cleaner than the KMJ junk and 1/2 the price.
For the grounds I went from the negative battery terminal to the stud above the alternator bracket. Second ground went from the frame rail and I bolted it to the engine block behind the motor mount using one of the open threaded holes on the block.
Sent from my iPhone using Tapatalk