Cheapest and easiest.Just go to local parts store and get 4 Haloneg sealed beams.Next cheapest upgrade is the low beams the have the H4 bulbs in them.We had halogebs in all our old cars.My 57 would light up the road like it was daylight.KID is expensive both to install and to replace.Have them aimed also that males a difference.Lots here will say you need relays.My kid 62 has had Halogens in it for 9 years with no problems.Biggest thing with relays is they usually let more power go to the lights.Rocky