My bad 😁.. in everyday speech three-point generally refers to the standard 'lap and diagonal' setup .... you're meaning the type with two shoulder straps that 'y' to a single rear mounting .... harness bar is the way to go but be sure the end result meets the fitting spec for angle over your shoulder (with a harness bar you could also fit full 4-point) .... as Scott says, they need to be tight to work and that gives issues with mobility (and, until you're used to them, they can feel quite claustrophobic compared to the freedom to fidget at will of standard belts) .... looking forward to seeing the build blog of your car
K
