I figure 80-90s when I look at OLDER restorations from that time period. Ive used it before and it’s tough to make it look really good. The painless stuff (or similar) looks better imo. More like today’s modern harnesses. It’s an improvement over the 30’s stuff which doesn’t allow as easy access to the wires. Uncoil the loom wrap anywhere you want basically. It’s a matter of taste and opinion. Everyone has their reasons as clif stated in his post.
