I’ve had several friends and customers use the mopar chrome or orange ECU. I quit those years ago. And yes, go ahead and flame away and tell me they have sold millions of them. Well, they are made in China now and they could care less about quality. I recently worked on a 68 Charger done back in the early 2000. It had a brand new mopar distributor kit with an orange box. It was never driven much because it had a bad flat spot off idle. He finally brought it back to me to get it straightened out. I used the Petronix system on the last three customers with good results but did have problems out of the points conversion kit with a Petronix III. I talked to Don at FBO and decided to give his a try. His distributor curve fixed my problems with the stumble. The first thing I noticed on both of the cars that I installed them on so far is that my flash on my timing light is much brighter and the timing mark does not jump around. It is rock steady. I’m using it on all my customers cars now.