Yes on the h/l relays. Anything that has draws some amps should have one for safety sake. Electric fuel pumps, electric fans, electric water pumps. Also some things that are key controlled...if you are using EFI the ECU should have one....
I rewired my 68, didn`t use relays, the lights are bright in the garage even in the daylight. bigger wire and better fuse block w/ a better design. works for me-