Quick Splices?

DO NOT use them, a good friend bought a 66 B body 10.90 index car a few years back. I went over to look it over & found multiple scotch-loks under the dash. I told him we should rewire it & do away with all of the cobbled up wiring. He said he just wanted to finish the season & rewire it after that. To make a long story short, he went to the last race of the season & turned on the master power switch. As he looked up, all he saw was smoke pouring out the window. He shut the power off & when the smoke cleared, he found that one of the scotch-loks had come apart & shorted out to the body.