"Best" has to be defined. The best quality, diagrams, instructions, most extras, complete kit is American Autowire. Around $465. The best price is not American Autowire. EZ, painless and others are quite a bit "bester". I have used AAW and I have done my own from scratch. You can buy wire, connectors and contacts that are just like the kits. BUT you have to have a good schematic and a good understanding of wiring. The 63 will be a bit more complicated than the 55-59's I do.
