This may be a simple answer to my question but here it is.  

I have an early 1970 240Z with the headlight wiring that uses the ground circuit for the wiring.  It also switches the ground for the high beam.  I wanted to know if the wiring harness that is common (Dave Irwin's) will work on this model or do I need to do some sort of modification.  I have run across threads that say its different for the early models that use the ground wire. So I just want to be sure.

I hope this makes sense....

I am also going to make the harness myself so I just want to make sure I follow the correct method to wire it all up.

 

Thanks, Tim M

Yes, the harness works on a 70.

I bought mine from Dave years ago when he was still in WA. for my 6/70 and it works great. 

 

Thanks guys, I am going to make the wiring harness from what I believe are Dave's instructions.  I picked up all the connectors, fuses and relays needed for it.