Trunk Vent Tube Question

I'm pretty sure 71 had evac separation system, the original tank was a 4 vent version so it most likely was this type of system. In mine, the car was gutted from a slant 6 and then a 360 dropped in, and it wasn't done well, they also left off the kickdown/TPV linkage when they did the swap and a bunch of other highly irritating issues I've been chasing my tail with. With regard to this, would capping all 4 off and using a truly vented gas cap work?