[Zoomad75]

I'm running a H4/H1 bulb in my 75. Just to let you know, H1 bulbs just have one spade and then the bulb is grounded through the socket on the housing. H1's are typically used in fog lights and off road lights, not regular headlights.

My bulbs have an extra socket for the H1's to give me an integrated fog light without having to mount addtional lights on the bumper.

I'd stick with all H4 bulbs unless your bulb housing has an addtional socket for the H1 bulbs. then you will have to wire them up separately (with a relay too).